期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 6, 期 18, 页码 3565-3571出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.5b01669
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资金
- U.S. Department of Energy, Office of Science, Basic Energy Sciences [DE-SC-0012541]
- NSF PREM [DMR-1205302]
- MC-CAM Program at UCSB
- Mitsubishi Chemical Corporation (Japan)
- MRSEC Program of the National Science Foundation [DMR 1121053]
- Virgil Elings and Betty Elings Wells through the Elings Fellowship Awards
- Swiss National Science Foundation [PBSKP2-145825]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1205302] Funding Source: National Science Foundation
- Swiss National Science Foundation (SNF) [PBSKP2_145825] Funding Source: Swiss National Science Foundation (SNF)
While recent improvements in the reported peak power conversion efficiency (PCE) of hybrid organic-inorganic perovskite solar cells have been truly astonishing, there are many fundamental questions about the electronic behavior of these materials. Here we have studied a set of electronic devices employing methylamrnonium lead iodide ((MA)PbI3) as the active material and conducted a series of temperature-dependent measurements. Field-effect transistor, capacitor, and photovoltaic cell measurements all reveal behavior consistent with substantial and strongly temperature-dependent polarization susceptibility in (MA)PbI3 at temporal and spatial scales that significantly impact functional behavior. The relative PCE of (MA)PbI3 photovoltaic cells is observed to reduce drastically with decreasing temperature, suggesting that such polarization effects could be a prerequisite for high-performance device operation.
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