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Efficient and stable planar all-inorganic perovskite solar cells based on high-quality CsPbBr3 films with controllable morphology
摘要： All-inorganic cesium lead bromide (CsPbBr3) perovskite is attracting growing interest as functional materials in photovoltaics and other optoelectronic devices due to its superb stability. However, the fabrication of high-quality CsPbBr3 films still remains a big challenge by solution-process because of the low solubility of the cesium precursor in common solvents. Herein, we report a facile solution-processed approach to prepare high-quality CsPbBr3 perovskite films via a two-step spin-coating method, in which the CsBr methanol/H2O mixed solvent solution is spin-coated onto the lead bromide films, followed by an isopropanol-assisted post-treatment to regulate the crystallization process and to control the film morphology. In this fashion, dense and uniform CsPbBr3 films are obtained consisting of large crystalline domains with sizes up to microns and low defect density. The effectiveness of the resulting CsPbBr3 films is further examined in perovskite solar cells (PSCs) with a simplified planar architecture of fluorine–doped tin oxide/compact TiO2/CsPbBr3/carbon, which deliver a maximum power conversion efficiency of 8.11% together with excellent thermal and humidity stability. The present work offers a simple and effective strategy in fabrication of high-quality CsPbBr3 films for efficient and stable PSCs as well as other optoelectronic devices.
关键词： CsPbBr3,Morphology control,Stability,All-inorganic perovskite solar cells,Solution-processed
更新于2025-09-12 10:27:22
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Hole‐Boosted Cu(Cr,M)O <sub/>2</sub> Nanocrystals for All‐Inorganic CsPbBr <sub/>3</sub> Perovskite Solar Cells
摘要： The all-inorganic CsPbBr3 perovskite solar cell (PSC) is a promising solution to balance the high efficiency and poor stability of state-of-the-art organic–inorganic PSCs. Setting inorganic hole-transporting layers at the perovskite/electrode interface decreases charge carrier recombination without sacrificing superiority in air. Now, M-substituted, p-type inorganic Cu(Cr,M)O2 (M = Ba2+, Ca2+, or Ni2+) nanocrystals with enhanced hole-transporting characteristics by increasing interstitial oxygen effectively extract holes from perovskite. The all-inorganic CsPbBr3 PSC with a device FTO/c-TiO2/m-TiO2/CsPbBr3/Cu(Cr,M)O2/ structure carbon achieves an efficiency up to 10.18 % and it increases to 10.79 % by doping Sm3+ ions into perovskite halide, which is much higher than 7.39 % for the hole-free device. The unencapsulated Cu(Cr,Ba)O2-based PSC presents a remarkable stability in air in either 80 % humidity over 60 days or 80 8C conditions over 40 days or light illumination for 7 days.
关键词： CsPbBr3,inorganic hole-transporting materials,all-inorganic perovskite solar cells,long-term stability,perovskites
更新于2025-09-11 14:15:04
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Hole-Boosted Cu(Cr,M)O <sub/>2</sub> Nanocrystals for All-Inorganic CsPbBr <sub/>3</sub> Perovskite Solar Cells
摘要： The all-inorganic CsPbBr3 perovskite solar cell (PSC) is a promising solution to balance the high efficiency and poor stability of state-of-the-art organic–inorganic PSCs. Setting inorganic hole-transporting layers at the perovskite/electrode interface decreases charge carrier recombination without sacrificing superiority in air. Now, M-substituted, p-type inorganic Cu(Cr,M)O2 (M = Ba2+, Ca2+, or Ni2+) nanocrystals with enhanced hole-transporting characteristics by increasing interstitial oxygen effectively extract holes from perovskite. The all-inorganic CsPbBr3 PSC with a device FTO/c-TiO2/m-TiO2/CsPbBr3/Cu(Cr,M)O2/carbon structure achieves an efficiency up to 10.18 % and it increases to 10.79 % by doping Sm3+ ions into perovskite halide, which is much higher than 7.39 % for the hole-free device. The unencapsulated Cu(Cr,Ba)O2-based PSC presents a remarkable stability in air in either 80 % humidity over 60 days or 80 8C conditions over 40 days or light illumination for 7 days.
关键词： CsPbBr3,inorganic hole-transporting materials,all-inorganic perovskite solar cells,long-term stability,perovskites
更新于2025-09-11 14:15:04