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  • Open Access

    SHORT COMMUNICATION

    Treating CsPbI3 Perovskite with Pyrrolidinium Iodide to Improve the Performance of Perovskite Solar Cells

    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 (Eg: ∼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

    Treating CsPbI<sub>3</sub> Perovskite with Pyrrolidinium Iodide to Improve the Performance of Perovskite Solar Cells

  • Open Access

    REVIEW

    Recent Progress of Surface Passivation Molecules for Perovskite Solar Cell Applications

    Baohua Zhao1, Teng Zhang2,*, Wenwen Liu2, Fansong Meng2, Chengben Liu1, Nuo Chen2, Zhi Li3, Zhaobin Liu3, Xiyou Li2,*

    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

    Recent Progress of Surface Passivation Molecules for Perovskite Solar Cell Applications

  • Open Access

    ARTICLE

    Passivation of PEA+ to CsPbI3 (110) Surface States: From the First Principles Calculations

    Wei Hu1,2, Fengjuan Si3, Hongtao Xue1, Wensheng Li1, Jun Hu4, Fuling Tang1,*

    Journal of Renewable Materials, Vol.11, No.3, pp. 1293-1301, 2023, DOI:10.32604/jrm.2022.023095

    Abstract This work investigates the effect of passivation on the electronic properties of inorganic perovskite CsPbI3 materials by using first-principles calculations with density functional theory (DFT). The passivation effect after the addition of Phenylethylamine (PEA+ ) molecule to CsPbI3 (110) surface is studied. The results of density of states (DOS) calculations show that the CsPbI3 (110) surface model with I atom terminated reveals new electronic DOS peaks (surface states) near the Fermi level. These surface states are mainly due to the contribution of I-5p orbital and are harmful to the CsPbI3-based solar cells because they reduce the photoelectric conversion efficiency. The… More > Graphic Abstract

    Passivation of PEA<sup>+</sup> to CsPbI<sub>3</sub> (110) Surface States: From the First Principles Calculations

  • Open Access

    REVIEW

    Fabrication and Modification Strategies of Metal Halide Perovskite Absorbers

    Xueyuan Wei, Yang Bai*, Qi Chen*

    Journal of Renewable Materials, Vol.11, No.1, pp. 61-77, 2023, DOI:10.32604/jrm.2023.022773

    Abstract Due to the long carrier lifetime, high carrier mobility, and high absorption coefficient of perovskite materials, the power conversion efficiency (PCE) of perovskite solar cells (PSCs) has increased from 3.8% in 2009 to 25.7% in 2021, which have already surpassed the PCE of thin-film solar cells and closes to the efficiency of Si-based photovoltaics (26.7%). Therefore, PSCs have become a promising clean energy technology for commercialization. However, the low defect formation energy of perovskite leads to a higher defect density than other conventional photovoltaic materials. It results in severe non-radiative recombination, limiting its further development and the commercialization. In this… More > Graphic Abstract

    Fabrication and Modification Strategies of Metal Halide Perovskite Absorbers

  • Open Access

    ARTICLE

    Grain Boundary Passivation Modulated by Molecular Doping for High-Performance Perovskite Solar Cells

    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

    Grain Boundary Passivation Modulated by Molecular Doping for High-Performance Perovskite Solar Cells

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