期刊
NANO LETTERS
卷 16, 期 1, 页码 681-687出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b04461
关键词
Two-dimensional electron gas; photoluminescence; LaAlO3/SrTiO3; chemisorption
类别
资金
- National Science Foundation (NSF) [DMR 1124696]
- Nanoscale Research Initiative (NRI) of the Semiconductor Research Corporation (SRC) under Nanoelectronics and Beyond in 2020 (NEB2020) Program
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering [DE-FG02-07ER46453, DE-SC0004764]
- NSF [DMR 1124696]
- NRI of the SRC under the NEB2020 Program
- U.S. Department of Energy Office of Basic Energy Sciences [DE-FG02-07ER15920]
- National Science Foundation [DMR-1124696]
- Office of Naval Research [N00014-12-1-1033, N00014-14-1-0761, N00014-11-1-0664]
- Challenge Grant from High-Performance Computing Modernization Office of the Department of Defense
- National Energy Research Scientific Computing Center
- U.S. Dept of Education Graduate Assistantships in Areas of National Need-Renewable Energy Technologies and Infrastructure Networks [P200A100117]
- U.S. Department of Energy (DOE) [DE-SC0004764] Funding Source: U.S. Department of Energy (DOE)
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1124696] Funding Source: National Science Foundation
We report intense, narrow line-width, surface chemisorption-activated and reversible ultraviolet (UV) photoluminescence from radiative recombination of the two-dimensional electron gas (2DEG) with photoexcited holes at LaAlO3/SrTiO3. The switchable luminescence arises from an electron transfer-driven modification of the electronic structure via H-chemisorption onto the AlO2-terminated surface of LaAlO3, at least 2 nm away from the interface. The control of the onset of emission and its intensity are functionalities that go beyond the luminescence of compound semiconductor quantum wells. Connections between reversible chemisorption, fast electron transfer, and quanturn-well luminescence suggest a new model for surface chemically reconfigurable solid-state UV optoelectronics and molecular sensing.
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