Surface Chemically Switchable Ultraviolet Luminescence from Interfacial Two-Dimensional Electron Gas

Islam, Mohammad A.; Saldana-Greco, Diomedes; Gu, Zongquan; Wang, Fenggong; Breckenfeld, Eric; Lei, Qingyu; Xu, Ruijuan; Hawley, Christopher J.; Xi, X. X.; Martin, Lane W.; Rappe, Andrew M.; Spanier, Jonathan E.

doi:10.1021/acs.nanolett.5b04461

Title: Surface Chemically Switchable Ultraviolet Luminescence from Interfacial Two-Dimensional Electron Gas

Journal Article · 15 December 2015 · Nano Letters

DOI: https://doi.org/10.1021/acs.nanolett.5b04461 · OSTI ID:1867857

Islam, Mohammad A. ^[1]; Saldana-Greco, Diomedes ^[2]; Gu, Zongquan ^[3]; Wang, Fenggong ^[2]; Breckenfeld, Eric ^[4]; Lei, Qingyu ^[5]; Xu, Ruijuan ^[6]; Hawley, Christopher J. ^[3]; Xi, X. X. ^[5]; Martin, Lane W. ^[6]; Rappe, Andrew M. ^[2]; Spanier, Jonathan E. ^[3]

Drexel Univ., Philadelphia, PA (United States); University of Pennsylvania
Univ. of Pennsylvania, Philadelphia, PA (United States)
Drexel Univ., Philadelphia, PA (United States)
Univ. of Illinois at Urbana-Champaign, IL (United States)
Temple Univ., Philadelphia, PA (United States)
Univ. of California, Berkeley, CA (United States)

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 quantum-well luminescence suggest a new model for surface chemically reconfigurable solid-state UV optoelectronics and molecular sensing.

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Research Organization:: Univ. of Pennsylvania, Philadelphia, PA (United States)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC)

Grant/Contract Number:: FG02-07ER15920; FG02-07ER46453; SC0004764

OSTI ID:: 1867857

Journal Information:: Nano Letters, Journal Name: Nano Letters Journal Issue: 1 Vol. 16; ISSN 1530-6984

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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