Abstract
High-performance and durable perovskite solar cells (PSCs) have advanced rapidly, enabled in part by the development of superior interfacial hole-transporting layers (HTLs). Here, a new series of 2,3-diphenylthieno[3,4-b]pyrazine (DPTP)-based small molecules containing bis- and tetrakis-triphenyl amino donors (1-3) was synthesized from simple, low-cost, and readily available starting materials. The matched energy levels, ideal surface topographies, high hole mobilities of 8.57 × 10-4cm2V-1S-1, and stable chemical structures of DPTP-4D (3) make it an effective hole-transporting material, delivering a PCE of 20.18% with high environmental, thermal, and light-soaking stability when compared to the reference HTL materials, doped Spiro-OMeTAD and PTAA in PSC n-i-p planar devices. Overall, these DPTP-based molecules are promising HTM candidates for the fabrication of stable PSCs.
Original language | English (US) |
---|---|
Pages (from-to) | 2118-2127 |
Number of pages | 10 |
Journal | ACS Energy Letters |
Volume | 7 |
Issue number | 6 |
DOIs | |
State | Published - Jun 10 2022 |
Funding
M.-C.C. thanks the Ministry of Science and Technology of Taiwan (MOST 109-2113-M-008-011-MY2) and National Central University-Covestro Research Center (MOST 110-2622-8-008-007) for the financial support provided. T.J.M. thanks the US Office of Naval Research (Contract N00014-20-1-2116), and M.G.K. thanks the US Office of Naval Research (Contract N00014-20-1- 2725) for support of this work. They also thank the Northwestern University MRSEC under NSF Grant DMR-1720139 for use of the EPIC facility, Keck-II facility, and SPID facility of the NUANCE Center at Northwestern University (UPS, SEM, and AFM), which also received support from the Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource (NSF ECCS-1542205); the MRSEC program (NSF DMR-1720139); the International Institute for Nanotechnology (IIN); the Keck Foundation; and the State of Illinois. R.D.S. thanks the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and was supported by the U.S. DOE, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357 (PL and TRPL). D.Z. and J.Y. thank the National Key R&D Program of China (Grant No. 2018YFB0407102), the National Natural Science Foundation of China (NSFC) (Grant Nos. 61421002, 61675041, and 51703019), and the Sichuan Science and Technology Program (Grant Nos. 2019YFH0005, 2019YFG0121, and 2019YJ0178) for support (synthesis and characterization).
ASJC Scopus subject areas
- Chemistry (miscellaneous)
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Energy Engineering and Power Technology
- Materials Chemistry