Journal Article

FZJ-2019-01962

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Nonequilibrium Green's function picture of nonradiative recombination of the Shockley-Read-Hall type

Aeberhard, U. (Corresponding author)FZJ*

2019
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/21862  doi:10.1103/PhysRevB.99.125302

Abstract: A quantum-kinetic picture of Shockley-Read-Hall-type (SRH) defect-mediated recombination is derived within the nonequilibrium Green's function formalism for an optoelectronic device with selectively contacted, current-carrying extended states and a localized deep defect state in the energy gap. The theory is first tested for recombination from bulk band states and then implemented for defective bipolar homo- and heterojunction thin-film devices with realistic spatial variation of the band edge profile. While the quantum-kinetic treatment reproduces the semiclassical characteristics for a bulk absorber in flat-band and quasiequilibrium conditions, for which the conventional SRH picture is valid, it reveals nonclassical features such as recombination enhancement by tunneling into field-induced subgap states in the presence of large fields, or the complex recombination current flow at heterointerfaces. Being fully compatible with the rigorous treatment of electron-photon and electron-phonon scattering in the nonequilibrium Green's function (NEGF) formalism, the approach enables a consistent inclusion of defect-mediated nonradiative recombination in comprehensive NEGF simulations of nanostructure-based quantum optoelectronic devices such as quantum well lasers, LEDs and solar cells.

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Contributing Institute(s):

1. Photovoltaik (IEK-5)
2. JARA - HPC (JARA-HPC)

Research Program(s):

1. 121 - Solar cells of the next generation (POF3-121) (POF3-121)
2. Ab-initio description of charge carrier dynamics at defective interfaces in solar cells (jiek50_20171101) (jiek50_20171101)

Appears in the scientific report 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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