ACS Applied Materials & Interfaces
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2024
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IF 8.3
Wenran Wang,Xin Peng,Jianxin Zhang,Rong Huang,Huishi Guo,Zhenxiao Pan,Huashang Rao,Xinhua Zhong,Guizhi Zhang
Interface engineering strategies passivate defects on the polycrystalline perovskite film surface and improve the stability of corresponding perovskite solar cells (PSCs). However, a single interface engineering step can result in restricted benefits on various occasions. Therefore, an appropriate additional modification step can be necessary to synergistically improve the device performance. In this study, a two-step interface engineering strategy is developed. Initially, the CsPbI3 perovskite surface is modified by choline iodide (ChI) to construct a 1D ChPbI3/3D CsPbI3 heterojunction, and then an additional surface modification step with the use of crown ether is applied. The crown ether modification can further eliminate unpassivated surface defects after heterojunction construction. Benefiting from the inhibited interfacial recombination, the resultant carbon-electrode-based CsPbI3 PSCs (C-PSCs) deliver a champion efficiency of 18.78%, representing one of the highest levels in this field. Besides, crown ether can synergistically improve the stability of the device against moisture, heat, and light stress due to the enhanced hydrophobicity and suppressed ion migration.
研究领域:
材料科学
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能源科学
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DOI
PubMed
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 19
·2400269
·
IF 8
Jing-Ming Hao,Yong-Hui Song,Xue-Chen Ru,Zi-Du Li,Yi-Chen Yin,Bai-Sheng Zhu,Zhi Zhao,Guan-Jie Ding,Ya-Lan Hu,Zhen-Yu Ma,Hong-Bin Yao
All-inorganic CsPbI 3 perovskite is a promising emitter for deep-red light-emitting diodes (LEDs). However, presently fabricated CsPbI 3 polycrystalline films are composed of island-like polycrystals, encountering the problems of serious interface current leakage and low-efficiency carrier radiative recombination. Here, a CsPbI 3-x Br x quantum dots (QDs) matrix encapsulated CsPbI 3 polycrystal film is reported to address the low-efficiency issue of island-like CsPbI 3 polycrystalline film applied in deep-red LEDs. The developed QDs matrix encapsulation strategy has two benefits. One is the filling of void space in the island-like CsPbI 3 polycrystal film to suppress the interface current leakage. The other more important benefit is utilizing the strong carrier confinement effect of QDs to strengthen the formation of excitons in the composite film and thus improve the electroluminescence efficiency. Moreover, interesting grain growth is found between CsPbI 3-x Br x QDs and CsPbI 3 polycrystals, which further enhances the exciton transfer effect brought by the QDs matrix and optoelectronic properties of the fabricated composite films. Based on the obtained high-quality QDs/polycrystal composite films, efficient and bright deep-red LEDs are achieved with a peak external quantum efficiency of 15.24% and a maximum luminance of 3691 cd m −2 .
研究领域:
材料科学
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光电学
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DOI
高影响因子
Science China-Information Sciences
·
2024
·Vol. 67
·期 5
·1-7
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IF 7.3
Zhang Yong,Wei Xin,Gao Lei,Zhao Weijie,Sun Changjiu,Wei Junli,Yuan Mingjian,Ni Zhenhua,Lu Junpeng,Liu Hongwei
The wider color gamut represents the better reproducibility of the real natural colors. Perovskite materials exhibit promising potential in full-color wide-gamut displays because of the wide tunability and high saturability of their photon emission. However, the full-color wide gamut (>100% Rec.2020) has not been constructed due to the lack of the extreme red primary color (∼700 nm). Herein, the widest color gamut is realized, wherein α -CsPbI 3 is used to generate the extreme red primary color. An in-situ encapsulation approach is advised to stabilize α -CsPbI 3 at room temperature by means of polyvinylpyrrolidone (PVP). The α -CsPbI 3 encapsulated by PVP (denoted as P-CPI) shows highly saturated (FWHM (full width at half maximum) ∼28 nm) and extremely (∼697 nm) red emission. The green emission is provided by P-CPBr (CsPbBr 3 with PVP) which is also synthesized using the universal in-situ encapsulation approach. With the assistance of a commercial GaN chip, the RGB gamut is extended to the widest (151% NTSC, 113% Rec.2020).
研究领域:
材料科学
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显示技术
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光学工程
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DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2021
·Vol. 28
·期 6
·1030-1037
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IF 2.232
Yang Tao,Zheng Ya-peng,Chou Kuo-Chih,Hou Xin-mei
Lead halide perovskites have received increasing attention recently as a candidate material in various optoelectronic areas because of their high performance as light absorbers. Herein, we report the growth of CsPbI 3 nanobelts via a solution process. A single-crystalline CsPbI 3 nanobelt with uniform morphology can be achieved by controlling the amount of PbI 2 . A single-crystalline CsPbI 3 nanobelt possesses a mean width, length, and thickness of 100 nm, 5 µm, and 20 nm, respectively. In this work, photodetectors (PDs) based on individual CsPbI 3 nanobelts are constructed and found to perform well with an external quantum efficiency and responsivity of 2.39 × 10 5 % and 770 A/W, respectively. The PDs also show a high detectivity of up to 3.12 × 10 12 Jones, which is at par with that of Si PDs. The PDs developed in this work exhibit great promise in various optoelectronic nanodevices.
研究领域:
材料科学
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光电子学
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纳米技术
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DOI
高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Honggang Xie,Jiannan Xu,Can Gao,Jiejing Zhang,Chunxiao Gao,Xizhe Liu
CsPbI 3 triggers strong interest in the photovoltaic community for their promising photoelectric property and nonvolatility. However, CsPbI 3 layers with a-phase crystal structure are difficult for preparation, and these layers easily degrade to non-photoactive δ-phase at room temperature. Tuning the composition of precursor solutions is an important method for improving the properties of CsPbI 3 layers. Herein, we prepare inorganic a-CsPbI 3 perovskite solar cells using lead acetate as the lead source, which is different from conventional precursors with lead iodide as the lead source. The lead acetate precursor needs neither incorporating hydrogen iodide nor preparing PbI 2 complex, and it is shown to enlarge the grain size, improve the crystallinity and reduce the trap density of CsPbI 3 layers. By cooperating the lead acetate precursor with EDAI 2 additive, the power conversion efficiency (PCE) of devices increases from 9.2% to 12.9% and the photo-stability of these devices is improved simultaneously.
研究领域:
材料科学
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光伏技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Dongfang Xu,Meizi Wu,Yimin Bai,Baihui Wang,Hui Zhou,Zihao Fan,Na Zhang,Jieke Tan,Hongxiang Li,Hongtao Bian,Zhike Liu
Recently, the inverted CsPbI 3 perovskite solar cells (PSCs) have attracted extensive attentions due to their potential to combine with silicon solar cells for tandem devices with theoretical power conversion efficiency (PCE) of 44%. However, the reported self-assembled molecules (SAMs) as hole selected layer for inverted PSCs have poor wettability and serious agglomeration, which greatly limits the efficiency and stability of PSCs. To address above problem, niobium pentachloride (NCL) is applied to prevent SAMs agglomeration for a homogenous SAMs film with a hydrophilic surface. The optimized SAMs surface facilitates the deposition of the cesium lead triiodide (CsPbI 3 )film with an enhanced referred orientation, suppressed defects, and released stress. Consequently, the NCL-treated CsPbI 3 PSCs achieved a champion PCE of 21.24%, which is the highest PCE value for inverted all-inorganic PSCs. The optimized device maintained 97.61% initial PCE after 1000 h storage in air, and 92.27% initial PCE after 1000 h tracking at the maximum power point (MPP).
研究领域:
材料科学
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能源技术
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DOI
高影响因子
ACS Omega
·
2021
·
IF 3.512
Yu Ji,Jian-Bin Zhang,Hao-Ran Shen,Zhan Su,Hao Cui,Tao Lan,Jia-Qian Wang,Yu-Hui Chen,Lihui Liu,Kun Cao,Wei Shen,Shufen Chen
The wide application of CsPbI3 nanocrystals (NCs) is limited due to their poor phase stability. We reported that Mn2+-CsPbI3 NCs have better optical performance and phase stability. With a suitable Mn/Pb ratio (5.0%), Mn2+-doped α-CsPbI3 NCs exhibited the best stability under UV irradiation, ethanol addition, and heating. Under UV irradiation and addition of ethanol, photoluminescence (PL) intensities of CsPbI3 NCs could be only preserved up to 35% (22 min UV irradiation) and 10% (ethanol addition), respectively, whereas, Mn2+-doped CsPbI3 (5.0%) exhibited much improved stability, and their intensities could be preserved up to 70% (22 min UV) and 58% (ethanol), respectively. It should be noted that crystal-phase stability could be maintained at least 7 h even at 120 °C. We believe that the improved stability in extreme conditions for α-CsPbI3 NCs can be further applied to optoelectronic devices.
研究领域:
材料科学
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光电子学
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产品关联
DOI
PubMed
高影响因子
Materials
·
2025
·Vol. 18
·期 7
·1518
·
IF 3.2
Chengqi Liu,Zahir Abdalla,Xiaoqian Wang,Manrui Liu,Yanhui Jiao,Zisheng Tang,Qi Zhang,Yong Liu
Metal halide perovskite nanorods hold great promise for optoelectronic applications. However, they tend to undergo phase transitions due to the instability of the crystal phase under environmental conditions, leading to a rapid decline in the fluorescence efficiency. Here, we report a method in which trioctylphosphine (TOP) directly serves as both the surface ligand and solvent to synthesize highly stable α-CsPbI3nanorods (NRs). This approach produces monodisperse α-phase NRs with controlled sizes (1 μm and 150 nm in length, and an aspect ratio of 10:1), as confirmed by high-resolution transmission electron microscopy (TEM) and X-ray diffraction. The optimized NRs exhibit a high photoluminescence quantum yield of around 80%, as well as excellent environmental stability; after 15 days of storage, the photoluminescence quantum yield (PLQY) retention is 90%. Transient absorption spectroscopy shows that the carrier lifetime is extended to 23.95 ns and 27.86 ns, attributed to the dual role of TOP in defect passivation and hydrolysis suppression. This work provides a scalable paradigm for stabilizing metastable perovskite nanostructures through rational ligand selection, paving the way for durable perovskite-based optoelectronics.
研究领域:
材料科学
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光学
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产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2021
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IF 6.024
Yueli Liu,Qitao Li,Wenchao Zhang,Zifan Yang,Sijie Zhao,Wen Chen
All-inorganic CsPbI3 perovskite quantum dots (QDs) have attracted great attention since emerging as a new class of materials with superior light-harvesting properties and enhanced thermal stability compared to organic–inorganic hybrid perovskites. However, poor phase stability remains a bottleneck for practical applications. In the present work, CsPb(I1–xBrx)3 perovskite QDs are synthesized by Br doping to increase the tolerance factor for the improvement of phase stability, and the balance between the stability of solar cells and the power conversion efficiency (PCE) is considered by adjusting the Br doping content. It is found that the phase stability of CsPb(I1–xBrx)3 QDs is much improved, while their band gap increases from 1.77 to 1.89 eV when the Br doping content increases from 0 to 30%. CsPbI2.4Br0.6 QD-based perovskite solar cells (PSCs) achieve a proper balance between high PCE and stability; the PCE is 12.31%, approaching that of the CsPbI3-based PSCs (14.13%), and may retain 87% of the initial efficiency after 15 days of storage in ambient air.
研究领域:
材料科学
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光伏技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
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IF 5.155
Chunyu Sun,Xinzhan Wang,Yanmei Xu,Wanbing Lu,Xiaoyun Teng,Guangsheng Fu,Wei Yu
CsPbI 3 nanocrystals (NCs) with photoluminescence quantum yield (PLQY) larger than 90% have been synthesized at different temperature regions, and the physical origins for high PLQY were investigated. HRTEM images show that cubic phase CsPbI 3 (α-CsPbI 3 ) is surrounded by hexagonal Cs 4 PbI 6 in the low temperature region, and the ratio of CsPbI 3 and Cs 4 PbI 6 increases with increasing the reaction temperature. The strong confinement effect of Cs 4 PbI 6 leads to the high PLQY (95%) of α-CsPbI 3 NCs when the reaction temperature is 120 °C. The confinement effect of Cs 4 PbI 6 is weakened with increasing reaction temperature, which leads to the decrease of PLQY at 140 °C. However, non-radiative recombination is suppressed due to the microstructure improvement with further increasing the reaction temperature, and PLQY as high as 97% is achieved at 180 °C. Stability testing shows that fast degradation of α-CsPbI 3 NCs occur in low reaction temperature region, and α-CsPbI 3 NCs with high PLQY can be stored in air for 90 days when the reaction temperature is 180 °C.
研究领域:
材料科学
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物理化学
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DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 18
·185402
·
IF 3.874
Bingquan Han,Lei Zhang,Yuwei Cao,Benyi Li,Zhiyuan Liu,Lingbo Xu,Peng Wang,Ping Lin,Xiaoping Wu,Can Cui
CsPbI3 inorganic perovskites with ideal bandgap and much enhanced thermal stability compared with organic−inorganic hybrid perovskites, have attracted much interest in the field of solar cells. The performances of solar cells highly depend on the quality of perovskite films, yet the research on fabrication methods of inorganic perovskites is far below that of organic–inorganic hybrid counterparts. Antisolvent engineering is a widely used method in controlling the morphology and crystallinity of organic–inorganic hybrid perovskites. Its effect varies with parameters such as the physicochemical properties of antisolvents and the compositions of perovskite precursors. Specially, there lacks a comprehensive study comparing different antisolvents used in low-temperature processed CsPbI3 from dimethylammonium-based precursors. In this work, we used three different antisolvents to control the growth of CsPbI3 films in a low-temperature (<200 °C) processed procedure and systematically compared the properties of resultant films. The green antisolvent ethyl acetate (EA) engineered CsPbI3 films exhibit improved morphology and crystallinity as well as reduced defects, compared with the counterparts processed without antisolvent or those with widely employed toxic antisolvents toluene and chlorobenzene. The EA antisolvent engineering results in efficient CsPbI3 perovskite solar cells with a champion power conversion efficiency of 8.8%. Our work thus provides a green and viable way to prepare high quality CsPbI3 perovskite films for optoelectronic applications.
研究领域:
材料科学
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能源科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 28
·10604-10612
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IF 5.7
Zhongyu Liu,Hongwei Wang,Haijun Han,Hong Jiang,Ning Liu,Jianwei Wang,Jing Zhang,Tian Cui,Xiaohui Liu
An inorganic perovskite CsPbI3 with a suitable bandgap and excellent optoelectronic properties has attracted tremendous attention as a promising absorber in perovskite solar cells (PSCs). A surface modification strategy of introducing organic molecules with functional groups to treat perovskite films has been proven to be an effective route to achieve high-performance PSC devices. However, the effect of the molecular size of modifiers is almost ignored in surface passivation studies. In this work, three alkylamine modifiers with different molecular sizes were incorporated to post-treat CsPbI3 films to systematically investigate the influence of alkyl chain length on device performance. It was found that the alkylamine treatments can remarkably ameliorate film morphology and interface contact, passivate defects, and increase hydrophobicity, resulting in greatly improved device efficiency and stability. In particular, the CsPbI3 film treated with 1,5-pentanediamine (PDA) with a suitable chain length acquires optimum results owing to its most efficient passivation effect and suppressed nonradiative recombination. Consequently, the inverted PDA-based CsPbI3 PSC exhibits a champion power conversion efficiency (PCE) of 19.52%, outperforming the control device with a PCE of 13.43% and other alkylamine-treated devices. Furthermore, both the unencapsulated PDA-treated CsPbI3 films and PSC devices present considerably enhanced long-term stability. This work highlights the great significance of tailoring the molecular size of interfacial modifiers towards achieving efficient and stable inorganic PSCs.
研究领域:
材料科学
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）