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2,3-Diphenylthieno[3,4-b]pyrazines as Hole-Transporting Materials for Stable, High-Performance Perovskite Solar Cells

Journal Article · · ACS Energy Letters
 [1];  [2];  [1];  [3];  [3];  [4];  [3];  [3];  [5];  [3];  [3];  [4];  [1];  [6];  [1];  [3];  [3];  [3]
  1. National Central Univ., Taoyuan (Taiwan)
  2. Univ. of Electronic Science and Technology of China, Chengdu (China); Northwestern Univ., Evanston, IL (United States)
  3. Northwestern Univ., Evanston, IL (United States)
  4. Univ. of Electronic Science and Technology of China, Chengdu (China)
  5. National Kaohsiung University of Science and Technology (Taiwan)
  6. Northwestern Univ., Evanston, IL (United States); Argonne National Lab. (ANL), Lemont, IL (United States). Center for Nanoscale Materials

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, in this study, 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 × 10–4 cm2 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.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); US Department of the Navy, Office of Naval Research (ONR); Northwestern University; National Science Foundation (NSF); W.M. Keck Foundation; State of Illinois; Ministry of Science and Technology of Taiwan (MOST); National Central University; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC02-06CH11357; FG02-99ER14999
OSTI ID:
1924243
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 6 Vol. 7; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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