期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 47, 页码 15529-15533出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201810809
关键词
glass transition temperature; hole-transport materials; organic semiconductors; perovskite solar cells; solar energy
资金
- Canadian Institute for Advanced Research Funding Source: Medline
- National Science Foundation [DMR-1231319] Funding Source: Medline
- Netherlands Organisation for Scientific Research [680-50-1511] Funding Source: Medline
- Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada [CREATE Sustainable Synthesis] Funding Source: Medline
- Ontario Research Fund Funding Source: Medline
- King Abhullah University of Science and Technology [KUS-11-009-21] Funding Source: Medline
We report design principles of the thermal and redox properties of synthetically accessible spiro-based hole transport materials (HTMs) and show the relevance of these findings to high-performance perovskite solar cells (PSCs). The chemical modification of an asymmetric spiro[ fluorene-9,9'-xanthene] core is amenable to selective placement of redox active triphenylamine (TPA) units. We therefore leveraged computational techniques to investigate five HTMs bearing TPAgroups judiciously positioned about this asymmetric spiro core. It was determined that TPA groups positioned about the conjugated fluorene moiety increase the free energy change for holeextraction from the perovskite layer, while TPAs about the xanthene unit govern the T-g values. The synergistic effects of these characteristics resulted in an HTM characterized by both a low reduction potential (approximate to 0.7V vs. NHE) and a high T-g value (> 1258 degrees C) to yield a device power conversion efficiency (PCE) of 20.8% in a PSC.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据