材料科学
特征(语言学)
光电子学
凝聚态物理
物理
语言学
哲学
作者
R. Thandaiah Prabu,Satyajeet Sahoo,K. Valarmathi,Abhishek Raj,Pranay Ranjan,Atul Kumar,A. Laref
标识
DOI:10.1016/j.mssp.2023.107539
摘要
Skink feature in the current density-voltage (J–V) characteristic is observed in an inorganic perovskite CsPbI3 thin film solar cell. The fabricated CsPbI3 solar cell attained maximum efficiency of 8.8% under one sun illumination. It showed a prominent skink phenomenon in the positive biasing region near the open-circuit voltage in the illuminated J–V curve. Skink is a curvilinear s-shape feature in J-V that dramatically deteriorate the fill factor. This study explored the probable cause of such a skink feature by theoretical modelling. It is observed that energy level mismatch, through a relatively high valence band offset (VBO) barrier at the hole transport layer HTL/perovskite junction along with a bulk defect in perovskite, replicates the skink feature in simulated J-V. We showed a one-to-one relation between the skink feature in the J-V curve and its steering parameters in the CsPbI3 device. This one-to-one dependence provides a peek into the device's working and is of great help for understanding the defect physics of experimental devices.
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