Numerical Analysis of Time Resolved Photoluminescence for Alumina/Cd(Se,Te) Double Heterostructures

Jordan Fox, Darius Kuciauskas, David Albin, Marco Nardone

Research output: Contribution to conferencePaper

Abstract

Al2O3 has demonstrated excellent Cd(Se,Te) surface passivation. In this work, recombination mechanisms were investigated by comparing simulations of time resolved photoluminescence (TRPL) to PL decay data (320 ns effective lifetime) for Al2O3 /Cd(Se,Te)/Al2O3 double heterostructures. Models were employed to investigate the effects of bulk and surface recombination, electric fields, mobility, and doping by simulating intensity-dependent single- (1PE) and two-photon excitation (2PE) TRPL. 2PE simulations replicate decay behavior while 1PE simulations require attention to charge redistribution. Various coupled mechanisms cannot be distinguished from PL decay data alone. Complementary measurements are required to constrain the model parameters and isolate mechanisms.
Original languageAmerican English
Pages551-556
Number of pages6
DOIs
StatePublished - 2021
Event2021 IEEE 48th Photovoltaic Specialists Conference (PVSC) -
Duration: 20 Jun 202125 Jun 2021

Conference

Conference2021 IEEE 48th Photovoltaic Specialists Conference (PVSC)
Period20/06/2125/06/21

NREL Publication Number

  • NREL/CP-5K00-80296

Keywords

  • CdTe
  • passivation
  • simulation
  • TRPL

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