Small
·
2026
·
IF 11.8
Yuanhao Cui,Jixuan Yang,Mengmeng Lu,Na Meng,Junhao Liu,Yuxuan Wei,Yulin Zhang,Ziqiang Wang,Yajing Li,Yutian Xu,Huili Ma,Xue Min,Zhelu Hu,Lingfeng Chao,Yingdong Xia,Qingxun Guo,Yonghua Chen
Thermal evaporation is an industry-compatible deposition technique with strong potential for scalable inorganic perovskite solar cells (PSCs), yet the performance of fully thermally evaporated CsPbI 2 Br devices remains constrained by poorly controlled solid-state crystallization, defect formation, and the unrevealed solid-state diffusion–crystallization mechanisms. Here, we report an effective solid-state crystallization regulation strategy for thermally evaporated CsPbI 2 Br, enabled by a thermally evaporated molecular regulator, dibenzo-18-crown-6 (DC), as a transient crystallization modulator. In situ measurements demonstrated that DC coordinates with Pb 2 + in the evaporated precursor stack, retarding solid-state nucleation and enabling more complete precursor diffusion and ordered grain growth during annealing. As a result, the DC-modified CsPbI 2 Br films exhibit substantially enhanced crystallinity, enlarged grain size, reduced trap-state density, and enhanced optoelectronic properties, while preserving the intrinsic bandgap of 1.92 eV. Solar cells fabricated with these films deliver a champion power conversion efficiency of 15.85%, representing the highest efficiency reported to date for thermally evaporated CsPbI 2 Br PSCs. Moreover, large-area (50 × 50 mm 2 ), sharply patterned perovskite films are readily fabricated using shadow masks, highlighting the scalability and manufacturing compatibility of this approach.
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 33
·2202829
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IF 19.924
Jie Xu,Jian Cui,Shaomin Yang,Zhike Liu,Xi Guo,Yuhang Che,Dongfang Xu,Wenjing Zhao,Ningyi Yuan,Jianning Ding,Shengzhong (Frank) Liu
CsPbI 2 Br perovskite is known for its advantages over its organic-inorganic hybrid counterpart including better thermal stability and appropriate bandgap for the front sub-cell of tandem solar cell. However, its lower-than-satisfactory efficiency, problematic phase stability and sensitivity to moisture hinder its further advancement. Here, three kinds of glycine halides (Gly- X : X = Cl, Br, and I) are strategically deigned to improve the performance of CsPbI 2 Br perovskite solar cells (PSCs). Systematic experimental and calculated results prove that a 2D/3D hybrid structure is formed, wherein the Gly-X-based 2D perovskite is mainly located at the CsPbI 2 Br grain boundaries, and the A-sites of the 2D perovskite form strong bonds with the 3D perovskite to suppress ion migration by increasing its activation energy. As a result, a power conversion efficiency (PCE) of 17.26% was obtained with an open-circuit voltage ( V OC ) of 1.33 V, which is among the best PCE values for the CsPbI 2 Br PSCs. In addition, the efficiency of encapsulated device decrease only by 14.1% after 340 h continuous illumination in ambient conditions, representing one of the most-stable inorganic PSCs reported so far. This work provides important insights into designing passivating agents to address the issue of phase segregation for the development of highly stable perovskite optoelectronic devices.
研究领域:
材料科学
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光伏技术
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化学工程
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DOI
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 8
·2200378
·
IF 4.149
Shanjing Liu,Xinyu Xu,Chuwu Xing,Guanming Ge,Duofa Wang,Tianjin Zhang
All-inorganic CsPbI 2 Br perovskite acquires affirmation in recent years by reason of the excellent balance between stability and power conversion efficiency (PCE), but its PCE is still inferior to the commercial application standard, of which inferiority roots from the uncontrolled crystallization and a mass of the imperfections. Herein, the crystallization is regulated by introducing a certain amount of lead acetate into the precursor, and the complex Pb(Ac) 2 × DMSO × PbI 2 forms in precursor. The Oswald crystal pattern changes into the 2D layered structure —3D cubic structure crystal pattern, and this transition process is delayed, and the complex in precursor is regarded as the 2D crystal growth template. And the iodine vacancy defects are passivated by the Ac − , and the PbO passivates the grain boundary defects, as proved by the photoluminescence spectrum and X-ray photoelectron spectroscopy. The two effects work together improve the performance of the CsPbI 2 Br perovskite solar cells. The PCE increases from 9.78% to 13.73%, and the open-circuit voltage increases from 1.23 to 1.32 V, which is one of the superior performances reported for the carbon-based pure CsPbI 2 Br perovskite solar cells to date.
研究领域:
光伏技术
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材料科学
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钙钛矿太阳能电池
·
晶体工程
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Mengen Ma,Yilin Zeng,Yuzhao Yang,Cuiling Zhang,Yujiao Ma,Shaohang Wu,Chong Liu,Yaohua Mai
The wide-band-gap inorganic CsPbI2Br perovskite material provides a highly matched absorption range with the indoor light spectrum and is expected to be used in the fabrication of highly efficient indoor photovoltaic cells (IPVs) and self-powered low-power Internet of Things (IoT) sensors. However, the defects that cause nonradiative recombination and ion migration are assumed to form leakage loss channels, resulting in a severe impact on the open-circuit voltage (VOC) and the fill factor (FF) of IPVs. Herein, we introduce poly(amidoamine) (PAMAM) dendrimers with multiple passivation sites to fully repair the leakage channels in the devices, taking into account the characteristics of IPVs that are extremely sensitive to nonradiative recombination and shunt resistance. The as-optimized IPVs demonstrate a promising PCE of 35.71% under a fluorescent light source (1000 lux), with VOC increased from 0.99 to 1.06 V and FF improved from 75.21 to 84.39%. The present work provides insight into the photovoltaic mechanism of perovskites under full sun and indoor light, which provides guidance for perovskite photovoltaic technology with industrialization prospects.
研究领域:
材料科学
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能源技术
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
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2020
·
IF 8.247
Ze Wang,Jiantuo Gan,Xiaodong Liu,Hangbo Shi,Qi Wei,Qiugui Zeng,Liang Qiao,Yonghao Zheng
All-inorganic cesium lead halide perovskites (CsPbX 3 , X = Cl, I, Br) have attracted great attention for developing high-performance photovoltaics due to their superb thermal stability. However, the short electron-hole diffusion lengths ( L D s) in CsPbI 2 Br perovskite are the primary limiting factor for further improvement of the power conversion efficiencies (PCEs) of the CsPbI 2 Br solar cells. Herein, a simple yet effective method is reported to prolong the L D s in CsPbI 2 Br via codoping of Zn 2+ and acetate (Ac − ) ions (i.e., using Zn(Ac) 2 as dopant). It is demonstrated that Zn 2+ partially replaces Pb 2+ to form a more stable black phase, and Ac − coordinates with Pb 2+ to passivate the defects at the perovskite grain boundaries which reduces electron-hole recombination within the perovskite. As a result, the L D s of Zn(Ac) 2 doped CsPbI 2 Br are greater than 1 μm, which is the first report on all-inorganic perovskites. The champion PCE of the CsPbI 2 Br solar cells is drastically increased from 12.31% to 14.93% upon doping with Zn(Ac) 2 , stemming mainly from the increased open-circuit voltage and fill factor. Furthermore, the non-encapsulated devices with Zn(Ac) 2 doped CsPbI 2 Br show less than 10% efficiency loss after storage in dry air for 30 days.
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
DOI
高影响因子
SOLAR ENERGY
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2021
·
IF 5.742
Kunming Zhang,Wenhui Li,Jiatao Yu,Xiuxun Han
Carbon electrode based hole transporting materials (HTM) free CsPbI 2 Br perovskite solar cells have advantages of excellent thermal stability and low cost. However, it is still a challenge to provide an effective strategy to realize highly efficient and stable HTM-free devices. Herein, a small amount (0.2–0.5% vs Pb source) of magnesium acetate (Mg(Ac) 2 ) was introduced into the CsPbI 2 Br precursor solution. It was demonstrated that the carbonyl groups of Mg(Ac) 2 can bind with all intrinsic elements of CsPbI 2 Br, leading to improved crystallinity and passivation of defects. Therefore, the power conversion efficiency of HTM-free devices was increased from 10.84% to 13.08%, along with an enhancement in device stability.
研究领域:
光伏技术
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材料科学
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钙钛矿太阳能电池
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可再生能源
✓ 已验证
DOI
高影响因子
Solar RRL
·
2023
·Vol. 7
·期 20
·2300369
·
IF 7.9
Haoyu Wang,Shuanghong Wu,Haolin Zhang,Xianghua Yao,Furong Wang,Peng Huang,Xiaodong Liu
The light-soaking (LS) effect has been reported to limit the accuracy and stability of device power output of perovskite solar cells (PSCs) and it is significant to develop effective approaches and strategies to eliminate the LS effect in PSCs. There are very few reports on suppressing the LS effect in CsPbI 2 Br-based all-inorganic PSCs. Herein, a method to eliminate the LS effect by synchronous passivation of anionic and cationic defects in CsPbI 2 Br perovskite film is demonstrated. The 4-(chlorosulfonyl)benzoic acid (CSBA) is added into perovskite precursor and the in situ generation of I 3 − effectively passivates the anionic halogen vacancy defects in CsPbI 2 Br. In the meantime, the Lewis base groups on CSBA coordinate with Cs + and Pb 2+ to passivate the cationic defects. This zwitterionic passivation effect of CSBA remarkably cuts off the path of defect-induced charge recombination and thus eliminates the LS effect. This work offers a deep opinion for future researchers to modulate the LS effect of all-inorganic PSCs.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Hongyan Cheng,Zhengjun Meng,Xueyan Ma,Hai Liu,Wenxuan Li,Linfeng Kang,Xuan Qi,Diao Yang,Yali Li,Yujun Fu,Deyan He,Junshuai Li
Carbon-based hole-transport-layer (HTL)-free CsPbI 2 Br solar cells present a promising balance among efficiency, stability and cost. Nevertheless, their performance is still restricted by bulk and interfacial defects, as well as energy level mismatch between CsPbI 2 Br and its neighboring layers. Herein, a series of uracil-based additives, including uracil, 5-cyanouracil (5-CU) and 5-nitrouracil (5-NU), are introduced into CsPbI 2 Br to construct dipolar molecular bridges that can simultaneously passivate defects (i.e., uncoordinated Pb 2+ and mobile halide ions in CsPbI 2 Br and uncoordinated Sn 4+ on the surface of SnO 2 ), improve crystallinity, and regulate interfacial energy level alignment. It is further found that the most polar 5-NU exhibits the best ability to realize these functions. The 5-NU-optimized device thus achieves a leading power conversion efficiency of 16.10%, with an exceptional open-circuit voltage of 1.345 V, significantly reduced hysteresis and excellent operational stability.
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产品关联
DOI
高影响因子
PHYSICA B-CONDENSED MATTER
·
2026
·
IF 3.2
Chuan Shan,Bin Yang,Huanpo Ning
Systematic comparison of argon vs. air synthesis atmospheres reveals material-dependent effects on hybrid MAPbI 2 Br and all-inorganic CsPbI 2 Br films. • Argon-synthesized perovskite films exhibit superior crystallinity, uniform grain morphology, and enhanced light absorption. • Air processing induces distinct behaviors: it promotes decomposition in MAPbI 2 Br but enables beneficial surface passivation in CsPbI 2 Br, delaying its phase transition. • The air ambient stability of MAPbI 2 Br surpasses that of CsPbI 2 Br regardless of synthesis atmosphere, attributed to its more favorable Goldschmidt tolerance factor from the larger A -site cation. This study systematically compares the microstructure, optoelectronic properties, and ambient stability of hybrid MAPbI 2 Br and all-inorganic CsPbI 2 Br thin films processed in an inert argon atmosphere versus ambient air. Films prepared in argon exhibit better crystallinity, more uniform grain morphology, and stronger light absorption. For the air-synthesized samples, A-CsPbI 2 Br shows improved stability and delayed phase transition compared to A-MAPbI 2 Br, which is attributed to surface passivation. Among the argon-synthesized samples, G-MAPbI 2 Br demonstrates better air stability due to its high crystalline quality and fewer defects, whereas G-CsPbI 2 Br is highly prone to degradation in air, likely due to the lack of surface passivation. Regardless of the synthesis atmosphere, the ambient stability of MAPbI 2 Br surpasses that of CsPbI 2 Br, owing to a more favorable tolerance factor provided by the larger A -site cation. These findings highlight the crucial roles of both synthesis atmosphere and material composition in governing the properties and stability of halide perovskites.
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DOI
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Wei Zhao,Lin Wu,Jian-Lin Chen,Jiayao Ju,Yuxi Zeng,Zihan Wu,Jintao He,Jincheng Huang,Zhuoyin Peng,Jian Chen
In recent years, hole transport layer-free all-inorganic CsPbI2Br carbon-electroded perovskite solar cells (C-PSCs) have garnered significant attention due to a trade-off between stability and photovoltaic performance. However, there are inevitably many defects generated at the surfaces or grain boundaries of CsPbI2Br perovskite films, which will serve as carrier non-radiative recombination centers, and CsPbI2Br perovskite films are sensitive to water molecules to degrade, together with energy level mismatch between CsPbI2Br perovskite and carbon electrodes. Herein, 1-benzyl-3-methylimidazolium hexafluorophosphate (1-B-3-MIMPF6), an imidazolium-based ionic liquid simultaneously containing benzene ring and fluorine atoms, was introduced for the modification of the perovskite/carbon interface. The results showed that it could effectively reduce defects, enhance carrier transfer, mitigate carrier non-radiative recombination, facilitate energy alignment, and block moisture intrusion. Therefore, the photovoltaic performance of the modified PSCs with ITO/SnO2/CsPbI2Br/1-B-3-MIMPF6/carbon architecture has been boosted with a champion power conversion efficiency (PCE) of 13.47%, open circuit voltage of 1.20 V, short circuit current density of 14.69 mA/cm2, and fill factor of 76%. Moreover, the unencapsulated modified devices exhibited an improved stability and maintained 78% of their initial PCE after 24 h storage at room temperature in a 30%–35% humidity environment, whereas the pristine devices dropped to almost zero.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Zhaoxuan Huang,Nan Tian,Shiyu Duan,Jicheng Zhang,Disheng Yao,Guoyuan Zheng,Yanhan Yang,Bing Zhou
Nickel oxide (NiOX) is an ideal inorganic hole transport material for the fabrication of inverted perovskite solar cells owing to its excellent optical and semiconductor properties. Currently, the main research on developing the performance of NiOX-based perovskite solar cells focuses on improving the conductivity of NiOX thin films and preventing the redox reactions between metal cations (Ni3+ on the surface of NiOX) and organic cations (FA+ or MA+ in the perovskite precursors) at the NiOX/perovskite interface. In this study, a new type of interface defects in NiOX-based CsPbI2Br solar cells is reported. That is the Pb2+ from CsPbI2Br perovskites can diffuse into the lattice of NiOX surface as the annealing temperature of perovskites changes. The diffusion of Pb2+ increases the ratio of Ni3+/Ni2+ on the surface of NiOX, leading to an increase in the density of trap state at the interface between NiOX and perovskites, which eventually results in a serious decline in the photovoltaic performance of solar cells.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lin Gao,Yongsheng Tu,Ruoshui Li,Fengli Liu,Xiaosong Qiu,Yuan Xu,Dongbin Jiang,Zhenbo Du,Yunhui Liu,Jihuai Wu,Miaoliang Huang,Zhang Lan
The tin dioxide (SnO 2 ) layer is commonly used as a traditional electron transport layer (ETL) in perovskite solar cells. However, it exists numerous defects in interior and on surface, diminishing the electron transport rate and causing energy level mismatches, thereby limiting the photoelectric conversion efficiency (PCE). In this study, cadmium p-aminobenzoate (PABACd) is synthesized using the displacement reaction and applied to modify the interface between the SnO 2 ETL and CsPbI 2 Br film to achieve bidirectional passivation. Cd 2+ effectively passivates defects in the ETL and penetrates perovskite crystals, contributing to defect passivation. Furthermore, PABA − stabilizes the [PbX 6 ] 4− octahedron, enhancing the stability of CsPbI 2 Br perovskite solar cells (PSCs). As a result of these interactions, the PABACd-optimized device achieved a maximum PCE of 14.34 % and an outstanding open-circuit voltage of 1.27 V. Simultaneously, the PCE of the optimized CsPbI 2 Br PSCs remains at 92 % of the initial efficiency after 30 days of aging in an air environment with 15–20 % humidity.
研究领域:
材料科学
·
能源科学
✓ 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）