Growth, steady-state, and time-resolved photoluminescence study of CdTe/MgCdTe double heterostructures on InSb substrates using molecular beam epitaxy
- Center for Photonics Innovation, Arizona State University, Tempe, Arizona 85287 (United States)
CdTe/MgCdTe double heterostructures (DHs) are grown on InSb substrates using molecular beam epitaxy and reveal strong photoluminescence with over double the intensity of a GaAs/AlGaAs DH with an identical layer structure design grown on GaAs. Time-resolved photoluminescence of the CdTe/MgCdTe DH gives a Shockley-Read-Hall recombination lifetime of 86 ns, which is more than one order of magnitude longer than that of typical polycrystalline CdTe films. These findings indicate that monocrystalline CdTe/MgCdTe DHs effectively reduce surface recombination, have limited nonradiative interface recombination, and are promising for solar cells that could reach power conversion efficiencies similar to that of GaAs.
- OSTI ID:
- 22217803
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 19 Vol. 103; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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