Qixian Zhang^#, Yi Guo^#, Huicong Liu, Weiping Li, Liqun Zhu, Haining Chen^*

Journal of Renewable Materials, Vol.11, No.8, pp. 3193-3201, 2023, DOI:10.32604/jrm.2023.027730

Abstract All-inorganic CsPbI₃ perovskite has attracted wide attention due to its desirable optical bandgap (E_g: ∼1.7 eV) as well as high chemical stability. Nevertheless, the photovoltaic performance of CsPbI₃ perovskite solar cells (PSCs) was limited by severe nonradiative charge recombination due to high defect density at the grain boundary and surface of perovskite films. To address this issue, a pyrrolidinium iodide (PyI) molecule was introduced to modify the surface and grain boundary of CsPbI₃ perovskite films to passivate defects, which improves the quality of CsPbI₃ perovskite films as well as induces the generation of a quasi-2D Py₂CsPb₂I₇ capping layer between perovskite… More > Graphic Abstract

Baohua Zhao¹, Teng Zhang^2,*, Wenwen Liu², Fansong Meng², Chengben Liu¹, Nuo Chen², Zhi Li³, Zhaobin Liu³, Xiyou Li^2,*

Journal of Renewable Materials, Vol.11, No.4, pp. 1533-1554, 2023, DOI:10.32604/jrm.2022.023192

Abstract

Due to the solution processable nature, the prepared perovskite films are polycrystalline with considerable number of defects. These defects, especially defects at interface accelerate the carrier recombination and reduce the carrier collection. Besides, the surface defects also affect the long-term stability of the perovskite solar cells (PVSCs). To solve this problem, surface passivation molecules are introduced at selective interface (the interface between perovskite and carrier selective layer). This review summarizes recent progress of small molecules used in PVSCs. Firstly, different types of defect states in perovskite films are introduced and their effects on device performance are discussed. Subsequently, surface passivation… More > Graphic Abstract

Yangyang Hao, Yue Liu^*, Guorui Cao^*

Journal of Renewable Materials, Vol.10, No.12, pp. 3505-3519, 2022, DOI:10.32604/jrm.2022.023122

Abstract Aiming to reduce the defects of perovskite film and improve carrier transport, an organic small molecule, benzo [d]isothiazol-3(2H)-one 1,1-dioxide (OBS), is introduced as an additive in the solution-processing of perovskite and prepare uniform perovskite films with a continuous distribution of OBS at grain boundaries. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy are conducted to reveal the interactions of hydrogen bonding and coordination bonding between OBS and perovskite. Various characterizations (including X-ray diffraction, UV-vis spectroscopy, electrochemical impedance spectroscopy, etc.) are conducted to uncover the effect of OBS on device performance. Consequently, high efficiency of 23.26% is obtained for the OBS-treated… More > Graphic Abstract

Miao He^*, Miao Wu^#, Duofa Wang, Tianjin Zhang^*

Journal of Renewable Materials, Vol.10, No.11, pp. 2883-2894, 2022, DOI:10.32604/jrm.2022.020535

Abstract The advancement in a power conversion efficiency (PCE) to reach 25%, the inorganic perovskites are being explored intensively as promising optoelectronic materials due to their excellent photovoltaic performance, i.e., thermal stability and efficiency. Lately, the inorganic cesium lead halide perovskite is studied to show enhanced light absorption, however, it suffers from the phase separate into I-rich and Br-rich phase which leads to poor film quality due to difference of electronegativity. Herein, we propose a unique solution of controlling the rate of solvent volatilization followed by gel method to inhibit phase separation effectively to obtain the homogenous and pinhole-free CsPbIBr₂ films… More >

Yongbin Jin^1,#, Zheng Fang^1,2,#, Liu Yang¹, Kaikai Liu¹, Mingliang Li¹, Yaping Zhao¹, Yujie Luo¹, Huiping Feng¹, Bingru Deng¹, Chengbo Tian¹, Changcai Cui², Liqiang Xie^1,*, Xipeng Xu^2,*, Zhanhua Wei¹

Journal of Renewable Materials, Vol.10, No.10, pp. 2509-2518, 2022, DOI:10.32604/jrm.2022.021400

Abstract Semi-transparent perovskite solar cells (ST-PSCs) are promising in building-integrated photovoltaics (BIPVs) and tandem solar cells (TSCs). One of the keys to fabricate high-performance ST-PSCs is depositing efficient transparent electrodes. Indium tin oxide (ITO) is an excellent transparent conductive oxide with good light transmittance and high conductivity. However, the high sheet resistance of ITO sputtered at room temperature leads to the low fill factor (FF) and poor power conversion efficiency (PCE) of the ST-PSCs. Here, we study the effect of the sputtering temperature on the properties of ITO and the performance of ST-PSCs. We find that when the sputtering temperature increases… More > Graphic Abstract