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    Optimization of CuIn1-XGaXS2 Nanoparticles and Their Application in the Hole-Transporting Layer of Highly Efficient and Stable Mixed-Halide Perovskite Solar Cells

    , Article ACS Applied Materials and Interfaces ; Volume 11, Issue 34 , 2019 , Pages 30838-30845 ; 19448244 (ISSN) Khorasani, A ; Marandi, M ; Khosroshahi, R ; Malekshahi Byranvand, M ; Dehghani, M ; Zad, A. I ; Tajabadi, F ; Taghavinia, N ; Sharif University of Technology
    American Chemical Society  2019
    Inorganic hole-transport materials (HTMs) have been frequently applied in perovskite solar cells (PSCs) and are a promising solution to improve the poor stability of PSCs. In this study, we investigate solution-processed copper indium gallium disulfide (CIGS) nanocrystals (NCs) as a dopant-free inorganic HTM in n-i-p type PSCs. Moreover, Cs0.05(MA0.17-FA0.83)0.95Pb(I0.83Br0.17)3 mixed-halide perovskite with proper crystalline quality and long-time stability was utilized as the light-absorbing layer under ambient conditions. To optimize the cell performance and better charge extraction from the perovskite layer, the Ga concentration in the Cu(In1-XGaX)S2 composition was changed, and the X... 

    Sb2S3 and Cu3SbS4 nanocrystals as inorganic hole transporting materials in perovskite solar cells

    , Article Solar Energy ; Volume 223 , 2021 , Pages 106-112 ; 0038092X (ISSN) Mohamadkhani, F ; Heidariramsheh, M ; Javadpour, S ; Ghavaminia, E ; Mahdavi, S. M ; Taghavinia, N ; Sharif University of Technology
    Elsevier Ltd  2021
    One of the key parts of perovskite solar cells which has great influence on their performance and stability is hole transporting layer. Spiro-OMeTAD is extensively used as organic hole transporting material in perovskite solar cells. However, Spiro-OMeTAD is expensive and has low chemical stability. In this study, the solution processed Sb2S3 and Cu3SbS4 nanocrystals have been synthesized and then the n-i-p mesoscopic perovskite solar cells have been fabricated using Spiro-OMeTAD, Sb2S3 and Cu3SbS4 nanocrystals as hole transporting layer at ambient air condition. It is shown that the conduction and valence band levels of the synthesized Sb2S3 and Cu3SbS4 nanocrystals are in the proper... 

    Stable Photodetectors based on fstable photodetectors based on formamidinium lead iodide quantum well perovskite nanoparticles fabricated with excess organic cations.ormamidinium lead iodide quantum well perovskite nanoparticles fabricated with excess organic cations

    , Article ACS Applied Nano Materials ; Volume 4, Issue 8 , 2021 , Pages 7788-7799 ; 25740970 (ISSN) Hasanzadeh Azar, M ; Mohammadi, M ; Rezaei, N.T ; Aynehband, S ; Shooshtari, L ; Mohammadpour, R ; Simchi, A ; Sharif University of Technology
    American Chemical Society  2021
    Metal halide perovskite nanoparticles have recently attracted immense interest for photodetectors due to their outstanding optical and electronic properties such as high carrier diffusion length, tunable band gap (light absorption range), and high photoluminescence (PL) efficiency. Although significant progress has been achieved in the development of perovskites, their stability is yet to be addressed. To improve the stability and quantum efficiency of FAPbI3 perovskite nanocrystals, we present a room temperature protocol to fabricate fully passivated and stable FAPbI3 nanocrystals via 2D growth in the presence of amine ligands and an excess amount of the organic cations. The crystallization...