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Stabilized hole-selective layer for high-performance inverted p-i-n perovskite solar cells

Journal Article · · Science
 [1];  [2];  [3];  [1];  [1];  [1];  [1];  [1];  [1];  [4];  [5];  [1]
  1. City University of Hong Kong, Kowloon (Hong Kong)
  2. City University of Hong Kong, Kowloon (Hong Kong); Huazhong University of Science and Technology, Wuhan (China)
  3. National Renewable Energy Laboratory (NREL), Golden, CO (United States); University of Chinese Academy of Sciences, Beijing (China)
  4. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  5. Huazhong University of Science and Technology, Wuhan (China)

P-i-n geometry perovskite solar cells (PSCs) offer simplified fabrication, greater amenability to charge extraction layers, and low-temperature processing over n-i-p counterparts. Self-assembled monolayers (SAMs) can enhance the performance of p-i-n PSCs but ultrathin SAMs can be thermally unstable. Here we report a thermally robust hole-selective layer comprised of nickel oxide (NiOx) nanoparticle film with a surface-anchored (4-(3,11-dimethoxy-7H-dibenzo[c,g]carbazol-7-yl)butyl)phosphonic acid (MeO-4PADBC) SAM that can improve and stabilize the NiOx/perovskite interface. The energetic alignment and favorable contact and binding between NiOx/MeO-4PADBC and perovskite reduced the voltage deficit of PSCs with various perovskite compositions and led to strong interface toughening effects under thermal stress. The resulting 1.53–electron-volt devices achieved 25.6% certified power conversion efficiency and maintained >90% of their initial efficiency after continuously operating at 65 degrees Celsius for 1200 hours under 1-sun illumination.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); Innovation and Technology Fund; Research Grants Council of Hong Kong; Green Tech Fund; Science Technology and Innovation Committee of Shenzhen Municipality; National Natural Science Foundation of China; Youth Foundation of Hubei Scientific Committee
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
2205184
Report Number(s):
NREL/JA--5F00-86170; MainId:86943; UUID:78c0c9a7-aff4-4cb4-9fbd-33f9894bd4bd; MainAdminID:71017
Journal Information:
Science, Journal Name: Science Journal Issue: 6668 Vol. 382; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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