Novel Carbazole-Based Hole-Transporting Materials with Star-Shaped Chemical Structures for Perovskite-Sensitized Solar Cells
详细信息 查看全文
- 作者：Min Soo Kang ; Sang Do Sung ; In Taek Choi ; Hyoungjin Kim ; MunPyo Hong ; Jeongho Kim ; Wan In Lee ; Hwan Kyu Kim
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2015
- 出版时间：October 14, 2015
- 年：2015
- 卷：7
- 期：40
- 页码：22213-22217
- 全文大小：313K
- ISSN：1944-8252
文摘
Novel carbazole-based hole-transporting materials (HTMs), including extended 蟺-conjugated central core units such as 1,4-phenyl, 4,4鈥?biphenyl, or 1,3,5-trisphenylbenzene for promoting effective 蟺鈥撓€ 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.