Dark Current Suppression via Multi-Bind Self-Assembled Monolayers as a Hole Transport Layer for Improved Electrical Properties in Perovskite Photodetectors
발표자
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초록
내용
This study investigated the effects of multi-bind self-assembled monolayers (SAM) using tripodal triazatruxene derivativeas a hole transport layer (HTL) in efficient perovskite photodetectors. The device with controlled SAMhigh hydrophobicity and low surface energy which prevent moisture penetration and subsequent degradation of the perovskite layer, thereby increasing the device lifetime. Especially, the device with multi-bind SAM exhibits approximately 1.56 times higher PL (photoluminescence) emission compared to the MeO-2PACz film, indicating a decreased nonradiative charge recombination. The device utilizing hole-conducting monolayers displays 0.03 times lower dark current (3.54 × 10-8 A cm-2), suggesting higher shunt resistance, and exhibits 5.3 times higher detectivity (5.06 × 1012 cm Hz1/2W-1), indicating improved charge blocking and leakage current suppression capabilities against external injection.