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Nanographene Coupled with Interfacial Pyrene Derivatives for Thermally Stable Perovskite Solar Cells

Journal Article · · ACS Energy Letters
 [1];  [2];  [3];  [2];  [4];  [5];  [2];  [6]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States). Chemistry and Nanoscience Center; Sungkyunkwan University, Suwon (Republic of Korea)
  2. CY Cergy Paris University, Cergy (France)
  3. Sungkyunkwan University, Suwon (Republic of Korea)
  4. National Renewable Energy Laboratory (NREL), Golden, CO (United States); University of Colorado, Boulder, CO (United States)
  5. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  6. Sungkyunkwan University, Suwon (Republic of Korea); Sungkyunkwan University, Suwon (Republic of Korea). SKKU Institute of Energy Science and Technology (SIEST)
Although high-efficiency perovskite solar cells (PSCs) have been achieved using a hole-extracting material, spiro-MeOTAD, thermal stability has been unattainable due to the low glass transition temperature of spiro-MeOTAD and additives therein. In this paper we report on the use of nanographene-based hole-transporting materials coupled with a pyrene derivative as an interface modifier for thermally stable and high efficiency PSCs. Asymmetric methyl and methoxy groups are introduced in the diphenylamino group that is attached to the hexa-peri-hexabenzocoronene (HBC) nanographene core, coded HBC-DPAMeOMe. 1-Pyrenemethylammonium iodide is coupled to enhance the chemical interaction between perovskite and HBC-DPAMeOMe, which leads to a power conversion efficiency over 23%. A thermal stability test at 85 degrees C for 1000 h reveals that 83.6% of the initial efficiency (23.04% --> 19.25%) is maintained for the device with HBC-DPAMeOMe, while a significant degradation from 20.69% to 5.08% is observed for the device with spiro-MeOTAD. Nanographene-based hole conductors shed light on the thermal stability issue in PSCs.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
French National Research Agency (ANR); Hubert Curien Partnership; Korea Evaluation Institute of Industrial Technology; National Research Foundation of Korea (NRF); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1973689
Report Number(s):
NREL/JA--5900-86255; MainId:87028; UUID:f364bbaa-fbb0-4701-a930-28f8fb61f4f9; MainAdminID:69488
Journal Information:
ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 5 Vol. 8; ISSN 2380-8195
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (5)