Journal of Energy Chemistry
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2023
·
IF 13.1
Qingyan Chang,Yidan An,Huaiman Cao,Yuzhen Pan,Liangyu Zhao,Yulong Chen,Yi We,Sai-Wing Tsang,Hin-Lap Yip,Licheng Sun,Ze Yu
All-inorganic CsPbIBr 2 perovskite has attracted widespread attention in photovoltaic and other optoelectronic devices because of its superior thermal stability. However, the deposition of high-quality solution-processed CsPbIBr 2 perovskite films with large thicknesses remains challenging. Here, we develop a triple-component precursor (TCP) by employing lead bromide, lead iodide, and cesium bromide, to replace the most commonly used double-component precursor (DCP) consisting of lead bromide and cesium iodide. Remarkably, the TCP system significantly increases the solution concentration to 1.3 M, leading to a larger film thickness (∼390 nm) and enhanced light absorption. The resultant CsPbIBr 2 films were evaluated in planar n-i-p structured solar cells, which exhibit a considerably higher optimal photocurrent density of 11.50 mA cm −2 in comparison to that of DCP-based devices (10.69 mA cm −2 ). By adopting an organic surface passivator, the maximum device efficiency using TCP is further boosted to a record efficiency of 12.8% for CsPbIBr 2 perovskite solar cells.
研究领域:
材料科学
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光伏技术
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太阳能电池
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产品关联
DOI
高影响因子
Chinese Physics B
·
2022
·Vol. 31
·期 12
·128802
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IF 1.652
Youming Huang,Yizhi Wu,Xiaoliang Xu,Feifei Qin,Shihan Zhang,Jiakai An,Huijie Wang,Ling Liu
All-inorganic, hole-transporting-layer-free CsPbIBr2 perovskite solar cells have great potential for development, but their device performance needs to be further improved. Recently, metal nanostructures have been successfully applied in the field of solar cells to improve their performance. Nano Ag-enhanced power conversion efficiency (PCE) in one CsPbIBr2 perovskite solar cell utilizing localized surface plasmons of Ag nanoparticles (NPs) on the surface has been researched experimentally and by simulation in this paper. The localized surface plasmon resonance of Ag NPs has a near-field enhancement effect, which is expected to improve the light absorption of CsPbIBr2 perovskite photovoltaic devices. In addition, Ag NPs have a forward-scattering effect on the incident light, which can also improve the performance of CsPbIBr2-based perovskite photovoltaic devices. By directly assembling Ag NPs (with a size of about 150 nm) on the surface of fluorine-doped tin oxide it is found when the particle surface coverage is 10%, the CsPbIBr2 perovskite photovoltaic device achieves a best PCE of 2.7%, which is 9.76% higher than that of the control group. Without changing any existing structure in the ready-made solar cell, this facile and efficient method has huge applications. To the best of our knowledge, this paper is the first report on nano Ag-enhanced photoelectric conversion efficiency in this kind of CsPbIBr2 perovskite solar cell.
研究领域:
材料科学
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能源科学
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物理化学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Xianhua Tan,Xingyue Liu,Zhiyong Liu,Bo Sun,Junjie Li,Shuang Xi,Tielin Shi,Zirong Tang,Guanglan Liao
CsPbIBr 2 perovskite exhibits the most balanced bandgap and durability features among all the inorganic perovskites, showing great potential in the photoelectric field. Nevertheless, the poor film quality of the traditionally spin-coated CsPbIBr 2 restricts the further improvement of the device performance. Here, we develop a novel lithium (Li) doping strategy to promote the optical, morphological and electronic properties of the solution-processed CsPbIBr 2 perovskites. Upon incorporating Li + ions into CsPbIBr 2 lattice, highly crystallized and well-oriented CsPbIBr 2 crystals are obtained. The as-prepared Li-doped CsPbIBr 2 exhibits a higher film coverage over the substrate with larger grains and less grain boundaries compared to the none-doped counterparts. The trap-state densities in the CsPbIBr 2 film are also effectively alleviated while the carrier lifetimes are elongated by Li doping, contributing to a lower energy loss and a higher charge collection efficiency. The optimized Li-doped perovskite solar cells (PSCs) demonstrate an excellent champion power conversion efficiency (PCE) of 9.25%, much higher than that of the none-doped devices (7.41%). Furthermore, the unencapsulated devices present a superior air and thermal stability under the protection of the hydrophobic CuPc layer and carbon electrode. Our work provides a new opportunity to fabricate cost-effective and highly efficient CsPbIBr 2 PSCs in a facile way.
研究领域:
材料科学
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能源技术
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物理化学
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产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 10
·期 6
·2202159
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IF 6.389
Xiao Liu,Yu Jing,Chunyan Wang,Xin Wang,Ruoshui Li,Yuan Xu,Zhongliang Yan,Huayan Zhang,Jihuai Wu,Zhang Lan
Perovskite silicon tandem solar cells are one of the effective ways to further improve the photoelectric conversion efficiency (PCE) in the research and development of solar cells in the future. CsPbIBr 2 can be used as the top cell material in tandem solar cells due to its wider bandgap and better long-term stability. However, the serious defect density and carrier recombination limit its further improvement. In this work, Octylammonium Octyldithiocarbamate (ODTC) is added to the CsPbIBr 2 precursor. Through its strong metal ion complexing ability, it combines with the uncoordinated Pb 2+ in the CsPbIBr 2 , and then thermally decomposes to produce PbS during the annealing process. As an additive, ODTC modulates the crystallization of CsPbIBr 2 , increases the crystal size, reduces defect density, extends carrier lifetime, and improves charge transfer. Moreover, in situ-generated PbS can also optimize photovoltaic performance of CsPbIBr 2 perovskite solar cell (PSC). Consequently, the champion PCE of the devices can attain to 10.15% and still maintain an initial efficiency of 90% after 45 days. Therefore, the strategy is an effective way to prepare efficient and stable CsPbIBr 2 PSCs.
研究领域:
材料科学
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光伏技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Zhenbo Du,Yuan Xu,Yu Jing,Ruoshui Li,Jianming Lin,Jihuai Wu,Zhang Lan
All-inorganic carbon-based CsPbIBr 2 perovskite solar cells (PSCs) have attracted attention due to their more balanced performance and stability. The performance of the PSCs is highly dependent on the quality of the absorber films. Unfortunately, most high-performance films are prepared in a glove box and conventional preparation methods often produce perovskite films within 400 nm of thickness, which is detrimental to large area device fabrication and limits their commercial application. Here we had demonstrated a short chain ligands nano-CsPbIBr 2 particles modified hot-casting method to deposit a perovskite film with thickness up to 800 nm. It was carried out by spin-coating a hot CsPbIBr 2 precursor solution onto nano-CsPbIBr 2 particles film on an electron transport layer (ETL), and then depositing nano-CsPbIBr 2 particles on the precursor film again before annealing. The nano-CsPbIBr 2 particles on the ETL promotes precursor solution crystallization and increased film thickness, and the nano-CsPbIBr 2 particles on the precursor film promoted grain growth and reduced defects due to compositional deviations from stoichiometric ratios. The power conversion efficiency (PCE) of the PSCs fabricated by this method is up to 10.66 %. The unencapsulated PSCs still retain more than 85 % of the initial PCE when stored at ambient atmosphere (RH 50–60 %) for 10 days.
研究领域:
材料科学
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太阳能
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纳米技术
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Xingyue Liu,Junjie Li,Zhiyong Liu,Xianhua Tan,Bo Sun,Shuang Xi,Tielin Shi,Zirong Tang,Guanglan Liao
CsPbIBr 2 perovskite , as a promising light harvester, possesses the most balanced bandgap and stability characters among all-inorganic perovskite materials. However, the poor quality of the traditionally one-step solution-processed CsPbIBr 2 film always leads to a severe recombination loss and thus a low output potential difference ( V oc ). Herein, we demonstrate a novel vapor-assisted deposition strategy to construct high-quality CsPbIBr 2 films for the first time, in which the crystallization kinetics of the CsPbIBr 2 is more easily controllable than that of the one-step spin-coated one. The PbBr 2 film acting as the template in the CsPbIBr 2 crystal growth is firstly prepared via an antisolvent-washing technique and CsI is then vacuum evaporated onto the PbBr 2 layer. By precisely tuning the thickness of the CsI film, highly phase-pure and crystallized CsPbIBr 2 crystals are successfully obtained. The optimized CsPbIBr 2 film also exhibits a homogeneous morphology and full coverage over the substrate with large grain sizes up to microscale and ultrahigh light absorption capability. The corresponding carbon-based CsPbIBr 2 solar cells achieve a champion power conversion efficiency of 8.76% with a superior V oc of 1.289 V. The large-area (1 cm 2 ) devices also deliver an efficiency of 6.78% with an impressive V oc of 1.336 V. Moreover, under the protection of the highly hydrophobic and chemically stable CuPc layer and carbon counter electrode, the unencapsulated devices present excellent moisture and thermal stabilities. Our work provides a new approach for the preparation of cost-effective, highly efficient and robust CsPbIBr 2 photovoltaics.
研究领域:
材料科学
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能源科学
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yingshen Lu,Danmin He,Xiang Yuan,Quanhe Yan,Xin Shu,Ziting Hu,Zifa Zhang,Zhuoyan Liu,Zuimin Jiang,Run Xu,Wenzhen Wang,Zhongquan Ma,Teng Chen,Haitao Xu,Fei Xu,Feng Hong,Hongwei Song
The realization of large-area high-quality perovskite thick films under an atmospheric environment without humidity control is confronting an urgent challenge for the applications in X-ray detection and imaging. A spray-coating method with air as the gas carrier is employed to achieve large-area perovskite thick films for X-ray flat-panel detection applications. To further improve the quality of the thick films, the 10 µm-thick CsPbIBr 2 films with (100)-preferred orientation, low trap density (7.1 × 10 12 cm −3 ) and high resistivity corresponding to low dark current (3.2 × 10 −9 A) are prepared via dual-additive-assisted (NH 4 SCN and L-α-phosphatidylcholine (LP)) solution strategy under atmospheric environment with relative humidity of 60% (60% RH). Thus, the metal-semiconductor-metal-structured (Au/CsPbIBr 2 /Au) transverse X-ray detection device under 40 KeV X-ray irradiation possesses a high sensitivity up to 1420 µC Gy air −1 cm −2 under a weak electric field of 18 V mm −1 and a low dose rate of 3.3 µGy air s −1 that is lower than a dose rate of ≈5.5 µGy air s −1 required for routine medical diagnosis. Strikingly, the unencapsulated device maintains 80% (1120 µC Gy air −1 cm −2 ) of the original sensitivity after 1000 h under the atmospheric environment with 45–55% RH. These results pave the way for the practical applications of perovskite thick films in X-ray medical detection and imaging.
研究领域:
材料科学
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医学成像
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半导体物理
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2019
·
IF 4.175
Cheng Wang,Junsen Zhang,Liangxing Jiang,Li Gong,Haipeng Xie,Yongli Gao,Haiping He,Zhishan Fang,Jincheng Fan,Zisheng Chao
In this paper, all-inorganic, hole-transporting-layer-free (HTLF), carbon-based CsPbIBr 2 planar solar cells with zinc oxide (ZnO) as electron-transporting materials (ETMs) were studied for the first time. The reported all-inorganic, HTLF, carbon-based cesium lead iodide dibromide (CsPbIBr 2 ) solar cells used titanium dioxide (TiO 2 ) as ETMs, which usually required a high sintering temperature of 500 °C. Here, ZnO ETMs were annealed at 120 °C. The highest power conversion efficiency (PCE) of 7.60%, with a short-circuit current ( J sc ) of 11.60 mA/cm 2 , an open-circuit voltage ( V oc ) of 1.03 V and the fill factor (FF) of 0.63, was obtained. Furthermore, the thermal and humid stabilities of the solar cells were studied. The perovskite solar cells were placed at 10% humidity and room temperature for 624 h and the PCE of perovskite solar cells only decreased by 10%. While the perovskite solar cells were placed at 80 °C and 0% humidity for 192 h, the PCE of the solar cells decreased by 4%.
研究领域:
材料科学
·
太阳能
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Li Gong,Jun-Sen Zhang,Cheng Wang,Hao Fu,Yang-Fan Lu,Jian-Lin Chen,Jin-Cheng Fan,Zi-Sheng Chao
In this paper, the ion substitution mechanism of CsPbIBr2 films prepared by a drop-coating method is studied. CsI/CsBr methanol solution is drop-coated on a CsPbIBr2 precursor film to prepare the CsPbIBr2 perovskite film. After drop-coating, it is found that the color of the perovskite film changes with CsI/CsBr methanol solution drop-coated on the perovskite precursor film. When CsBr methanol solution is drop-coated on a CsPbIBr2 precursor film, the color of the obtained CsPbIBr2 film is orange. The color of the obtained CsPbIBr2 film is brown while CsI methanol solution is drop-coated on a CsPbIBr2 precursor film. Then, the hole-free, carbon-based CsPbIBr2 perovskite solar cells (FTO/ZnO/CsPbIBr2/C) are fabricated. For the solar cells fabricated by drop-coating with 30 μL of CsBr, without methanol solution, with 10 μL of CsI, with 50 μL of CsI, and with 90 μL of CsI, the power conversion efficiency (PCE) values are 2.98, 3.99, 6.04, 7.60, and 8.42%, respectively. The short-circuit current density (JSC) also increases with the changing of drop-coating solution. Therefore, we suppose that perhaps there is an ion substitution during the preparation of the CsPbIBr2 films. The ion substitution supposition is verified by the results of X-ray diffraction, ultraviolet–visible spectra, X-ray photoelectron spectroscopy, and secondary ion mass spectroscopy. Specifically, the I element is replaced by the Br element while drop-coating CsBr methanol solution. The Br element is substituted by the I element by drop-coating CsI methanol solution. Also, it is verified that the ion substitution occurs in the entire perovskite film.
研究领域:
材料科学
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化学
·
物理学
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太阳能
✓ 已验证
DOI
高影响因子
Solar RRL
·
2024
·Vol. 8
·期 19
·2400443
·
IF 6
Shuyue Xue,Sheng Yang,Yukai Liu,Jinzhan Su
CsPbIBr 2 has garnered significant interest due to its ideal bandgap and good stability. However, defects formed at the interface between the electron transport layer and the perovskite can lead to increased non-radiative recombination, which negatively impacts both the power conversion efficiency (PCE) of perovskite solar cells and the long-term stability of the cells. Herein, the TiO 2 /perovskite interface is modified by adding sodium silicate to passivate the defects on the interface. The introduction of Na + partially reduces Ti 4+ to Ti 3+ in TiO 2 , thereby passivating trap states caused by oxygen vacancy defects and adjusting the energy level alignment between TiO 2 and the perovskite film, enhancing the carrier transport efficiency. Additionally, SiO 3 2− can form Si O Pb (and Cs) bonds with the undercoordinated Pb 2+ and Cs + on the surface of the perovskite layer, effectively passivating surface defects of the perovskite film and thereby improving the efficiency of the devices. Ultimately, the carbon-based all-inorganic CsPbIBr 2 perovskite solar cells treated with Na 2 SiO 3 exhibit a significantly improved PCE of 10.85% compared to 8.62% of the control sample and achieve a high open-circuit voltage of 1.31 V. With this modification, the devices also demonstrate reduced hysteresis effects and enhanced stability.
研究领域:
材料科学
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太阳能
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纳米技术
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
Science China-Materials
·
2022
·Vol. 66
·期 2
·485-492
·
IF 8.64
Yan Furi,Duan Jialong,Guo Qiyao,Zhang Qiaoyu,Yang Xiya,Yang Peizhi,Tang Qunwei
The colloidal nature of perovskite precursor solution highly determines the quality of perovskite film and the photovoltaic performance of a perovskite solar cell (PSC). Herein, we demonstrate a facile method to fabricate a high-quality all-inorganic CsPbIBr 2 film by regulating the temperature of the precursor solution. After characterization, stable microcrystals with a size up to 1 have been formed under high temperatures, more suitable for preferable crystallization by spontaneous nucleation than the precursor solution at room temperature. Consequently, rapid charge transfer across enlarged crystal grain rather than intragranular charge recombination is achieved within the perovskite film because of reduced defects, promoting the efficiency as high as 11.12% for carbon-based PSC, which is higher than that of a control device with 8.51% efficiency. Moreover, the optimal device shows improved stability under air atmosphere and high-temperature conditions.
研究领域:
材料科学
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光伏技术
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Yizhi Wu,Guangnan Zhao,Chenchao Liu,Shihan Zhang,Jiakai An,Yilin Zhou,Jiawei He,Minggang Cao,Lei Zhang,Huijie Wang,Buliang Chen
Solar cells face severe dust contamination issues during outdoor applications. The dust not only blocks incident light but may also cause hot-spot effects, significantly degrading photovoltaic device performance. This study pioneers the integration of self-cleaning functionality into all-inorganic CsPbIBr 2 solar cells by constructing a self-cleaning film (biomimetic film) on the light-receiving surface. The biomimetic film outside the device window features a ZnO nanorod forest microstructure consisting of nanorod clusters and exhibits low surface energy, thus rendering the photovoltaic device surface superhydrophobic and self-cleaning. Balancing self-cleaning functionality with photovoltaic performance, a 2 h hydrothermally grown ZnO nanorod structure proves optimal, yielding a maximum contact angle of 160° and a sliding angle of approximately 3°. Additionally, this study investigates dust’s impact on CsPbIBr 2 photovoltaic device performance: when devices accumulate 6.25 mg/cm² of dust, photovoltaic conversion efficiency decreases by 73%. Although the designed ZnO nanorod forest slightly affects light absorption in solar cells, its overall impact on device performance is minimal. The photovoltaic device with the coupled self-cleaning structure achieves over 90% of the performance of the blank control group, demonstrating a far smaller degradation than that caused by dust contamination.
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DOI
高影响因子
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