期刊
Joule
标题
Cesium Titanium(IV) Bromide Thin Films Based Stable Lead-free Perovskite Solar Cells
作者
Min Chen,Ming-Gang Ju, Alexander ,D. Carl, Xiao Cheng,Zeng,Yuanyuan Zhou
摘要
Cesium titanium(IV) halide perovskites (HPs) are promising all-inorganic, Pb-free materials for perovskite solar cells (PSCs). Here we show that high-quality, uniform thin films of Cs2TiBr6 HP can be prepared through a facile low-temperature vapor-based method. These thin films exhibit a favorable bandgap of ∼1.8 eV, long and balanced carrier-diffusion lengths >100 nm, suitable energy levels, and superior intrinsic and environmental stability. The first planar-heterojunction PSCs based on Cs2TiBr6 thin films show a stable efficiency of up to 3.3%.
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