材料科学
咔唑
钙钛矿(结构)
联苯
堆积
光致发光
电导率
溶解度
溶剂
结晶学
光化学
物理化学
光电子学
有机化学
化学
作者
Min Soo Kang,Sang Do Sung,In Taek Choi,Hyoungjin Kim,MunPyo Hong,Jeongho Kim,Wan In Lee,Hwan Kyu Kim
标识
DOI:10.1021/acsami.5b04662
摘要
Novel carbazole-based hole-transporting materials (HTMs), including extended π-conjugated central core units such as 1,4-phenyl, 4,4'-biphenyl, or 1,3,5-trisphenylbenzene for promoting effective π-π stacking as well as the hexyloxy flexible group for enhancing solubility in organic solvent, have been synthesized as HTM of perovskite-sensitized solar cells. A HTM with 1,3,5-trisphenylbenzene core, coded as SGT-411, exhibited the highest charge conductivity caused by its intrinsic property to form crystallized structure. The perovskite-sensitized solar cells with SGT-411 exhibited the highest PCE of 13.00%, which is 94% of that of the device derived from spiro-OMeTAD (13.76%). Time-resolved photoluminescence spectra indicate that SGT-411 shows the shortest decay time constant, which is in agreement with the trends of conductivity data, indicating it having fastest charge regeneration. In this regard, a carbazole-based HTM with star-shaped chemical structure is considered to be a promising candidate HTM.
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