ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Shengrong He,Jun Xing,Xiaorui Huang,Yue Sun,Xiaoman Ma,Ziyuan Huang,Bin Wang,Zhou Jiang,Ying Li,Longteng Wan,Jiahao Sun,Zhiyi Xu,Xiaolong Yao,Jiayong Zhang,Peng Li,Wei Li,Weili Yu
The 3D/2D perovskite film vertical heterojunction (3D/2D PFVH) has emerged as a promising candidate for high-performance photodetectors, as it overcomes the limitations of mono-perovskite while preserving their photoelectric properties and enhancing active layer stability, surface defect passivation, and carrier dynamics. However, controllable and cost-effective fabrication of efficient 3D/2D PFVH remains challenging. Herein, an improved hot-pressing reaction transfer-assisted method is proposed to successfully prepare high-quality 3D/2D PFVH after optimizing pressure and concentration. A carrier dynamics model is also proposed to elucidate the changes in defect states, carrier dynamics, and photophysical properties during the formation of 3D/2D PFVH. Furthermore, the efficient 3D/2D PFVH under optimal conditions exhibited remarkable enhancements in photoluminescence, carrier lifetime, humidity stability, and defect mitigation. Ultimately, the champion 3D/2D PFVH horizontal photodetector achieved a record-performance in photo-responsivity (R up to 4.59 A/W) and external quantum efficiency (EQE up to 1.07 × 10 3 %), signifying their superior light detection capabilities. This study offers valuable insights for designing high-quality 3D/2D PFVH for advanced high-performance planar optoelectronic devices for multiple scenes.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 35
·355201
·
IF 3.874
Yangyang Liu,Hui Cao,Xuhao Liu,Rongzhi Zhu,Tao Tao,Jinwei Sun
In this work, we report a novel two-dimensional (2D) (SrBr)2PbI4 perovskite layered architecture, which were formed by the reaction of strontium bromide (SrBr2), strontium iodide (SrI2) and lead iodide (PbI2). Formation of 2D (SrBr)2PbI4 was verified by small angle XRD peak at 6.4°, which corresponds to the layer distance of 13.78 Å. The best one of solar cells fabricated with Quasi-3D perovskite, (SrBr)2FA59Pb60I181 (n = 60), showed a power conversion efficiency (PCE) of 18.46% and retained 95% of the initial PCE at 1000 h in the dry air. Further, the 2D (SrBr)2PbI4 as the surface passivation layer on the 3D FAPbI3 perovskite greatly reduced the defects at the perovskite/Spiro-OMeTAD interface, and the corresponding solar cells with FAPbI3/(SrBr)2PbI4 3D/2D structure achieved a PCE of 22.14% and over 90% retention of the original PCE at 1000 h. In short, this work provides an example of inorganic complex cations that can form 2D perovskites and achieve perovskite solar cells with high PCE and stabilization at the same time.
研究领域:
材料科学
·
太阳能
·
光伏技术
✓ 已验证
DOI
高影响因子
Nature Energy
·
2023
·Vol. 8
·期 3
·294-303
·
IF 56.7
Luo Long,Zeng Haipeng,Wang Zaiwei,Li Min,You Shuai,Chen Bin,Maxwell Aidan,An Qinyou,Cui Lianmeng,Luo Deying,Hu Juntao,Li Shangzhi,Cai Xueqing,Li Weixi,Li Lin,Guo Rui,Huang Rong,Liang Wenxi,Lu Zheng-Hong,Mai Liqiang,Rong Yaoguang,Sargent Edward H.,Li Xiong
Two-dimensional (2D) and quasi-2D modifications of three-dimensional (3D) perovskite active layers have contributed to advances in the performance of perovskite solar cells (PSCs). However, the ionic diffusion between the surface 2D and bulk 3D perovskites leads to the degradation of the 3D/2D perovskite heterostructures and limits the long-term stability of PSCs. Here we incorporate a cross-linked polymer (CLP) on the top of a 3D perovskite layer and then deposit a 2D perovskite layer via a vapour-assisted two-step process to form a 3D/CLP/2D perovskite heterostructure. Photoluminescence spectra and thickness-profiled elemental analysis indicate that the CLP stabilizes the heterostructure by inhibiting the diffusion of cations (formamidinium, FA + and 4-fluorophenylethylammonium, 4F-PEA + ) between the 2D and 3D perovskites. For devices based on carbon electrodes, we report small-area devices with an efficiency of 21.2% and mini-modules with an efficiency of 19.6%. Devices retain 90% of initial performance after 4,390 hours operation under maximum power point tracking and one-sun illumination at elevated temperatures.
研究领域:
材料科学
·
光伏
·
化学
✓ 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）