Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2024
·
IF 3.9
Cuiping Xu,Xingming Yang,Xiaofan Sun,Wenchao Tang,Peiqi Ji,Junjie Jiang,Ziyi Xu,Hong-Ling Cai,X.S. Wu
In the present, we investigate the light-induced phase instability and the recovery in light-free for CsPbIBr 2 film. Both 585 nm and 695 nm photoluminescence (PL) peaks are detected by illuminating films. Results show that the appearance and the intensity of 585 nm and 695 nm PL peaks are affected by the wavelength, remaining time, and intensity of the illuminating light. Under short time illumination, the 695 nm PL peak may disappear after staying light-free, with light–dark reversible behavior. Under long time illumination, the 695 nm PL peak still exist in light-free and become irreversible behavior, which is caused by the formation of I-rich and Br-rich small grains, destroyed the homogeneous phase structure, and formed new steady states. X-ray diffraction analysis and the first principle calculations proved the mechanism of light-induced phase separation. We argue that CsPbIBr 2 -based solar cells are difficult to be applied before inhibiting the phase separation of CsPbIBr 2 .
研究领域:
材料科学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2021
·
IF 3.266
Zhu Chen,Qian Wang,Yinyan Xu,Lun Zhang,Akang Yang,Ru Zhou,Hongbo Lu,Mei Lyu,Jun Zhu
B-site doping is an effective strategy to improve the performance of inorganic perovskite solar cells . Zinc halides (ZnX 2 , X I, Br, Cl) doped CsPbIBr 2 solar cells were prepared by simply introducing ZnX 2 salts into the precursor solution for one step spin-coating process. The doped inorganic perovskite films exhibit enhanced crystallinity and improved surface morphology . More over, the photoluminescence and single-carrier device characterizations confirm that the internal defect density of CsPbIBr 2 films decreases remarkably after ZnX 2 doping and the non-radiative recombination is suppressed. The CsPbIBr 2 solar cells based on the ZnI 2 doped films achieve a champion efficiency of 8.15%, outperforming that (6.93%) of the pristine counterpart.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 12
·1666
·
IF 4.034
Jien Yang,Qiong Zhang,Jinjin Xu,Hairui Liu,Ruiping Qin,Haifa Zhai,Songhua Chen,Mingjian Yuan
Despite the successful improvement in the power conversion efficiency (PCE) of perovskite solar cells (PSCs), the issue of instability is still a serious challenge for their commercial application. The issue of the PSCs mainly originates from the decomposition of the organic–inorganic hybrid perovskite materials, which will degrade upon humidity and suffer from the thermal environment. In addition, the charge transport layers also influence the stability of the whole devices. In this study, inorganic transport layers are utilized in an inverted structure of PSCs employing CsPbIBr2as light absorbent layer, in which nickel oxide (NiOx) and cerium oxide (CeOx) films are applied as the hole transport layer (HTL) and the electron transport layer (ETL), respectively. The inorganic transport layers are expected to protect the CsPbIBr2film from the contact of moisture and react with the metal electrode, thus preventing degradation. The PSC with all inorganic components, inorganic perovskite and inorganic transport layers demonstrates an initial PCE of 5.60% and retains 5.56% after 600 s in ambient air at maximum power point tracking.Keywords:inorganic perovskite;CsPbIBr2;metal oxide transport layers
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2023
·Vol. 11
·期 11
·2300611
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IF 3.8
Yajie Zhao,Rui Ge,Jieyuan Zheng,Lirong Chen,Xingru Wang,Yang Zheng,Liuwen Zhong,Yanqing Zhu,Xueqing Xu,Gang Xu,Xiudi Xiao
Among all-inorganic perovskites, CsPbIBr 2 has become a potential candidate in semitransparent perovskite solar cells (ST-PSCs) due to its excellent thermal stability and suitable bandgap. Herein, by optimizing the ambient temperature in an N 2 -filled glovebox, the growth process of CsPbIBr 2 crystals is regulated to avoid the generation of pinholes and improve the photoelectric conversion capacity of perovskite cells. When the ambient temperature is around 25 °C, the champion power conversion efficiency (PCE) of 10.82% with opaque n–i–p structure is achieved. Based on MoO x /Ag/MoO x (20/12/20 nm) multilayer top electrode, the ST-PSC device achieves a maximum PCE of 7.06% at the fluorine-doped tin oxide side under the simulated 1 sun illumination condition and a PCE of 23.96% at MoO x /Ag/MoO x electrode side under the intensity of 1000 lux (≈350 μW cm −2 ) provided by a white light-emitting diode lamp, along with an average visible transmittance of 29.25%. The resulting perovskite solar cell is the first bifacial inorganic ST-PSC that could be used under both sunlight and indoor light, which is an important step toward all-day power generation of inorganic ST-PSCs and building-integrated photovoltaics.
研究领域:
材料科学
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能源技术
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光伏器件
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Zhenbo Du,Ruoshui Li,Yan Lu,Chunyan Deng,Jianming Lin,Jihuai Wu,Zhang Lan
The hot injection method is a commonly employed technique for the synthesis of perovskite nanoparticles that are subsequently used in the fabrication of perovskite solar cells (PSCs). However, this method presents a significant challenge related to the removal of ligands and the purification of nanoparticles. The issue arises from the use of long-chain ligands that are crucial for stabilizing the nanoparticles during their synthesis. These long-chain ligands, while serving their purpose during nanoparticle formation, can pose hindrances when the nanoparticles are integrated into a solar cell. Here, we prepared CsPbIBr2 nanoparticles stabilized with a short-chain ligand, amylamine (C5H13N). These nanoparticles were used to create nanoparticle films without the need for additional cleaning and purification steps. Subsequently, a high-quality bulk film was obtained by heat treatment. Additionally, we introduced a fast dual-step centrifugal deposition method differing from the conventional layer-to-layer spin coating approach. Films produced using this dual-step centrifugal deposition method exhibited a grain size of approximately 220 nm and near-vertical growth. As a result, our perovskite solar cells achieved a superior power conversion efficiency (PCE) exceeding 7.1%. This simplified and expeditious fabrication method holds promising implications for streamlining the perovskite solar cell production process in the future.
研究领域:
材料科学
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可再生能源
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2025
·Vol. 113
·期 3
·942-951
·
IF 3.2
Du Tianheng,Jin Liguo
This study thoroughly investigates the effects of different solvent engineering strategies on the structure and properties of SnO 2 electron transport layers (ETLs) and evaluates their performance-enhancing effects on carbon-based all-inorganic CsPbIBr 2 perovskite solar cells (PSCs). By comparing the SnO 2 ETLs prepared with ethanol (ET-SnO 2 ) and isopropanol (IPA-SnO 2 ) solvents and constructing corresponding CsPbIBr 2 PSCs devices, we comprehensively analysed the structure, morphology, wettability, light transmittance and electronic transport properties of the SnO 2 ETLs using characterization methods such as XRD, SEM, contact angle measurement, transmission spectroscopy, steady-state fluorescence spectroscopy and electrochemical impedance spectroscopy. Combined with the J-V characteristics of the device, we revealed the mechanism of the effect of solvent engineering on the performance of PSCs. The results showed that IPA-SnO 2 exhibited better performance with lower contact angle and higher compactness, which is conducive to electron transport and reduces interfacial defects. IPA-SnO 2 also promoted the growth of CsPbIBr 2 crystals, forming larger and denser crystal structures and reducing pinhole defects. In addition, IPA-SnO 2 improves the light transmittance of the FTO substrate and the light absorption of the CsPbIBr 2 film, thereby increasing the light trapping efficiency. Finally, the IPA-SnO 2 -based PSCs achieved a PCE of 5.95%, an improvement of 25% compared to ET-SnO 2 , demonstrating good application prospects. This study provides an important experimental basis for optimizing the preparation process of SnO 2 ETL and improving the performance of carbon-based CsPbIBr 2 PSCs. Graphical
研究领域:
材料科学
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能源技术
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光伏器件
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 5
·962
·
IF 4.324
Xianwei Meng,Kailin Chi,Qian Li,Yu Cao,Gengxin Song,Bao Liu,Haibin Yang,Wuyou Fu
As one of the most frequently-used electron-transporting materials, the mesoporous titanium dioxide (m-TiO2) film used in mesoporous structured perovskite solar cells (PSCs) can be employed for the scaffold of the perovskite film and as a pathway for electron transport, and the contact area between the perovskite and m-TiO2directly determines the comprehensive performance of the PSCs. Because of the substandard interface combining quality between the all-inorganic perovskite CsPbIBr2and m-TiO2, the development of the mesoporous structured CsPbIBr2PSCs synthesized by the one-step method is severely limited. Here, we used a solution containing PbI2, monoethanolamine (EA) and dimethyl sulfoxide (DMSO) (PED) as the interfacial modifier to enhance the contact area and modify the m-TiO2/CsPbIBr2contact characteristics. Comparatively, the performance of the solar device based on the PED-modified m-TiO2layer has improved considerably, and its power conversion efficiency is up to 6.39%.Keywords:all-inorganic perovskite;CsPbIBr2;solar cell;mesoporous structure;interfacial modification
研究领域:
材料科学
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能源科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energy Technology
·
2022
·Vol. 11
·期 1
·2200544
·
IF 4.149
Guizhang Sheng,Yajie Zhao,Jieyuan Zheng,Lirong Chen,Baotian Qiu,Liuwen Zhong,Yanqing Zhu,Gang Xu,Xiudi Xiao
CsPbIBr 2 has shown great potential in the optoelectronics field due to its well-balanced relationship between bandgap and durability among all-inorganic perovskites materials. However, the CsPbIBr 2 thin films prepared by the traditional one-step spin coating method suffer from unsatisfactory morphology, poor crystallinity, and high defect density, which lead to the degradation of device performance. Herein, a simple preannealing method is used to form unstable transition films which are then annealed at high temperature to obtain CsPbIBr 2 perovskite films with uniform morphology, free pinholes, and strong crystallinity. The performance of the device can be effectively improved due to the reduction of defects and the optimization of the contact between functional layers. Therefore, the power conversion efficiency of 9.6% is obtained, which is nearly 100% improvement compared with that of the control device.
研究领域:
材料科学
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光电子学
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太阳能
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 45
·期 20
·9243-9250
·
IF 3.591
Rufeng Wang,Haiming Zhang,Siqi Han,Yizhi Wu,Zhanning Hu,Guixiang Zhang,Haoxuan Liu,Qingchen He,Xianjing Zhang
The all-inorganic perovskite CsPbIBr2 is a promising material in the photovoltaic (PV) field due to its acceptable optical bandgap and favorable air-stable phase stability. However, the conventional solution-processed poor-coverage thin films make it a challenging task to prepare high-performance solar cells. In this work, we introduce cadmium ions (Cd2+) into CsPbIBr2 perovskite and investigate how this doping treatment would affect the PV performance of the carbon-based CsPbIBr2 all-inorganic perovskite solar cells (FTO/SnO2/CsPbIBr2/carbon). We found that the crystallinity and morphology of CsPbIBr2 thin films are significantly improved after Cd2+ doping, leading to improved light absorption and carrier transportation with reduced carrier recombination in perovskites. The optimized device achieved the highest efficiency of 6.79% in comparison with 4.36% for the device without Cd2+ doping, an increase of 56% in efficiency. Meanwhile, the optimized device with Cd2+ doping exhibited enhanced stability (76% of initial efficiency after 10 hours) in ambient atmosphere. Furthermore, the whole fabrication process of these devices is performed at low temperatures, not more than 160 °C. The present work provides a simple and economical strategy for the fabrication of low-temperature-processed CsPbIBr2 solar cells and the improvement in their performance.
研究领域:
材料科学
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 9
·期 6
·2145-2155
·
IF 7.059
Yongjin Long,Chenyang Wang,Xiaohui Liu,Jiahao Wang,Shiqiang Fu,Jing Zhang,Ziyang Hu,Yuejin Zhu
The all-inorganic CsPbIBr2 perovskite solar cell (PSC) has received tremendous attention due to its favorable photoelectric properties and superior stability against moisture and heat attack. Nevertheless, the reported power conversion efficiency (PCE) of CsPbIBr2 PSC is still far from its counterparts, mainly because of the inferior film crystallization and morphology of the CsPbIBr2 light-absorbing layer, along with much trap defects and severe charge recombination. Herein, all-inorganic perovskite CsPbIBr2 is doped with ZnBr2 to improve crystallinity and morphology, optimize energy level alignment and enhance photovoltaic performance of PSC. Consequently, with the optimized concentration of Zn2+ (1%, at.), CsPb0.99Zn0.01IBr2-based PSC shows the highest PCE of 10.51%, which is 34% higher than that of CsPbIBr2-based PSCs (7.84%). Furthermore, the unencapsulated CsPb0.99Zn0.01IBr2-based device exhibits superior long-term stability in ambient atmosphere and against heat. This study provides a feasible strategy for preparing a high quality perovskite film and improving the photovoltaic performance and long-term stability of CsPbIBr2 PSCs, aiming at promoting the potential applications of CsPbIBr2-based PSCs.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 20
·1651
·
IF 4.4
Qi Yu,Wentian Sun,Shu Tang
CsPbIBr2, with its suitable bandgap, shows great potential as the top cell in tandem solar cells. Nonetheless, its further development is hindered by a high defect density, severe carrier recombination, and poor stability. In this study, CsPbI1.5Br1.5quantum dots were utilized as an additive in the ethyl acetate anti-solvent, while a layer of CsPbBr3QDs was introduced between the ETL and the CsPbIBr2light-harvester film. The combined effect of these two QDs enhanced the nucleation, crystallization, and growth of CsPbIBr2perovskite, yielding high-quality films characterized by an enlarged crystal size, reduced grain boundaries, and smooth surfaces. And a wider absorption range and better energy band alignment were achieved owing to the nano-size effect of QDs. These improvements led to a decreased defect density and the suppression of non-radiative recombination. Additionally, the presence of long-chain organic molecules in the QD solution promoted the formation of a hydrophobic surface, significantly enhancing the long-term stability of CsPbIBr2PSCs. Consequently, the devices achieved a PCE of 9.20% and maintained an initial efficiency of 85% after 60 days of storage in air. Thus, this strategy proves to be an effective approach for the preparation of efficient and stable CsPbIBr2PSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Ziting Qi,Jiabao Li,Xinyu Zhang,Jie Dou,Qiyao Guo,Yuanyuan Zhao,Peizhi Yang,Qunwei Tang,Jialong Duan
Perovskite solar cells (PSCs) have attracted extensive attention in photovoltaic applications owing to their superior efficiency, and the buried interface plays a significant role in determining the efficiency and stability of PSCs. Herein, a plant-derived small molecule, ergothioneine (ET), is adopted to heal the defective buried interface of CsPbIBr2-based PSC to improve power conversion efficiency (PCE). Because of the strong interaction between Lewis base groups (–C═O and –C═S) in ET and uncoordinated Pb2+ in the perovskite film from the theoretical simulations and experimental results, the defect density of the CsPbIBr2 perovskite film is significantly reduced, and therefore, the nonradiative recombination in the corresponding device is simultaneously suppressed. Consequently, the target device achieves a high PCE of 11.13% with an open-circuit voltage (VOC) of 1.325 V for hole-free, carbon-based CsPbIBr2 PSCs and 14.56% with a VOC of 1.308 V for CsPbI2Br PSCs. Furthermore, because of the increased ion migration energy, the detrimental phase segregation in this mixed-halide perovskite is weakened, delivering excellent long-term stability for the unencapsulated device in ambient conditions over 70 days with a 96% retention rate of initial efficiency.
研究领域:
材料科学
·
可再生能源
·
光伏技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）