Additive Engineering for Efficient Phase Conversion in Durable Perovskite Photodetectors
발표자
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초록
내용
1,8-octanedithiol (ODT) additive is utilized for the formation of high-quality perovskite photosensitive layer. Specifically, via introducing ODT, the perovskite phase conversion is accelerated in the perovskite rapid precipitation process. It is based on the chemical interaction (ODT functional group (-SH)) and Pb non-coordination defect in MAPbI3). Also, perovskite thin film quality is evaluated for each ODT concentration. Via the contact angle analysis, the best interface condition is found with the optimal surface energy (relatively hydrophobicity). Based on this, an efficient performance (~9.91×1012 Jones (shot-noised based detectivity) and 128.96 dB (LDR)) is observed in the ODT-based device. In addition, compared to previous studies, it is confirmed that our ODT-PPD corresponds to a high-performance level. Finally, a successful ODT additive strategy for durable and fast photodetectors is proven via XPS stability and charge dynamics analysis.