Journal
ACS ENERGY LETTERS
Volume 7, Issue 6, Pages 2118-2127Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.2c00684
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Funding
- Ministry of Science and Technology of Taiwan [MOST 109-2113-M-008-011-MY2]
- National Central University-Covestro Research Center [MOST 110-2622-8-008-007]
- US Office of Naval Research [N00014-20-1-2116, N00014-20-1-2725]
- Office of Science, Office of Basic Energy Sciences, Department of Energy [DE-FG02-99ER14999]
- Northwestern University MRSEC under NSF [DMR-1720139]
- Soft and Hybrid Nanotechnology Experimental (SHyNE) Resource [NSF ECCS-1542205]
- MRSEC program [NSF DMR-1720139]
- International Institute for Nanotechnology (IIN)
- Keck Foundation
- State of Illinois
- U.S. DOE, Office of Basic Energy Sciences [DE-AC02-06CH11357]
- National Key R&D Program of China [2018YFB0407102]
- National Natural Science Foundation of China (NSFC) [61421002, 61675041, 51703019]
- Sichuan Science and Technology Program [2019YFH0005, 2019YFG0121, 2019YJ0178]
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This research synthesized a series of new DPTP-based small molecules as efficient hole-transporting materials, which can provide high efficiency and stability in PSC n-i-p planar devices.
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 x 10(-4) cm(2) V-1 S-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.
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