期刊
ACS ENERGY LETTERS
卷 6, 期 9, 页码 3044-3052出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.1c01186
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资金
- U.S. Department of Energy [DE-SC0019844]
- Air Force Office of Scientific Research BioPhysics program [FA9550-20-0157]
- National Science Foundation [1936432]
- Office of Naval Research [N00014-20-1-2602]
- National Science Foundation I/UCRC: Center for Energy Harvesting Materials and Systems
- Norfolk State University through the NSF CREST program
- U.S. Department of Energy (DOE) [DE-SC0019844] Funding Source: U.S. Department of Energy (DOE)
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1936432] Funding Source: National Science Foundation
The development of high-performance perovskite solar cells without charge-carrier-transport layers (CTLs) has been achieved by introducing perfluorotetradecanoic acid (PFTeDA) to suppress ion migration and reduce crystal defects in perovskites. The modified carbon-based HTL-free PSC shows a record PCE of 18.9%, with PFTeDA molecules enhancing environmental, thermal, and light stabilities at the grain boundaries between perovskite crystals.
Perovskite solar cells (PSCs) without charge-carrier-transport layers (CTLs) are theoretically achievable due to the ambipolar charge-carrier-transfer characteristics presenting in perovskites. However, the power conversion efficiency (PCE) of the CTL-free PSCs needs further improvement. Herein, we provide a breakthrough in the fabrication of the cost-effective high-performance holetransport-layer (HTL)-free PSC and trilayer PSC with device configurations of fluorine doped tin oxide (FTO)/SnO2/perovskite/carbon and FTO/perovskite/carbon, respectively. We introduce perfluorotetradecanoic acid (PFTeDA) with a carbonyl unit and carbon fluorine bonds to suppress the ion migration and reduce the crystal defects in perovskites. The modified carbon-based HTL-free PSC shows a record PCE of 18.9%. Furthermore, the PFTeDA molecules are found existing at the grain boundaries between the perovskite crystals, resulting in enhanced environmental, thermal, and light stabilities for the resultant cost-effective high-performance CTL-free PSCs.
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