Crystalline grain engineered CsPbIBr2 films for indoor photovoltaics
Crystalline grain engineered CsPbIBr2 films for indoor photovoltaics
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DOI：
10.1016/j.apsusc.2022.152865
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发表时间：
2022-02
影响因子：
6.7
通讯作者：
P. Ghosh;J. Bruckbauer;C. Trager-Cowan;Lethy Krishnan Jagadamma
中科院分区：
文献类型：
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作者：
P. Ghosh;J. Bruckbauer;C. Trager-Cowan;Lethy Krishnan Jagadamma
近年来，室内光伏设备因其为物联网（IoT）的“智能”电子设备供电的前景而获得了广泛的研究关注。研究结果表明，全无机铯基卤化物钙钛矿具有与室内光谱相匹配的宽禁带，具有很好的室内光捕获前景。高结晶和紧凑的cspbibr2钙钛矿基光伏器件在室内光照1000 lx下的功率转换效率（PCE）为14.1%，在1个太阳下的功率转换效率为5.9%。该研究表明，减少晶粒取向错误以及抑制钙钛矿薄膜中金属Pb形式的缺陷对于最大化cspbibr2基器件的光伏性能至关重要。结果表明，无针孔的CsPbIBr2/Spiro-OMeTAD界面保留了钙钛矿α相，提高了CsPbIBr2器件的空气稳定性。尽管这些器件未封装，但即使在30%相对湿度下储存40天的保质期内，也能保持最大PCE的55%，这是迄今为止报道的cspbibr2器件中稳定性最好的数据之一。
Indoor photovoltaic devices have garnered profound research attention in recent years due to their prospects of powering ‘smart’ electronics for the Internet of Things (IoT). Here it is shown that all-inorganic Cs-based halide perovskites are promising for indoor light harvesting due to their wide bandgap matched to the indoor light spectra. Highly crystalline and compact CsPbIBr2perovskite based photovoltaic devices have demonstrated a power conversion efficiency (PCE) of 14.1% under indoor illumination of 1000 lx and 5.9% under 1 Sun. This study revealed that a reduction in grain misorientation, as well as suppression of defects in the form of metallic Pb in the perovskite film are crucial for maximising the photovoltaic properties of CsPbIBr2based devices. It was demonstrated that a pinhole free CsPbIBr2/Spiro-OMeTAD interface preserves the perovskite α phase and enhances the air stability of the CsPbIBr2devices. These devices, despite being unencapsulated, retained > 55% of the maximum PCE even when stored under 30% relative humidity for a shelf-life duration of 40 days and is one of the best stability data reported so far for CsPbIBr2devices.