Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 16, Pages 9510-9516Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta00654k
Keywords
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Funding
- Natural Science Foundation of Jiangsu Province [BK20180867, BK20180869]
- National Natural Science Foundation of China [21805114]
- Jiangsu University Foundation [17JDG032, 17JDG031]
- High-tech Research Key Laboratory of Zhenjiang [SS2018002]
- High-Performance Computing Platform of Jiangsu University
- Priority Academic Program Development of Jiangsu Higher Education Institutions
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Two novel phenothiazine 5,5-dioxide (PDO) core building block-based hole transport materials (HTMs), termed PDO1 and PDO2, were designed and synthesized. The introduction of a sulfuryl group in a core unit can deeply influence the energy levels and charge carrier mobilities of relative HTMs. The combined suitable energy level alignment, higher hole mobility and conductivity, as well as highly efficient hole transfer of PDO2 enable the perovskite solar cell (PSC) to achieve an impressive power conversion efficiency (PCE) of 20.2% and good stability when aged under ambient conditions. These results demonstrate the potential versatility of the PDO building block for further development of cost-effective and highly efficient HTMs for PSCs.
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