Approach to Defect-Free Lifetime and High Electron Density in CdTe
Abstract
Achieving simultaneously high carrier density and lifetime is crucial to II-VI semiconductor-based applications such as photovoltaics and infrared detectors; yet, it is a challenging task. In this work, high purity CdTe single crystals doped with indium (In) were grown by vertical Bridgman melt growth under carefully controlled stoichiometry. Two-photon excitation time-resolved photoluminescence was employed to measure bulk recombination lifetime by eliminating surface recombination effects. By adjusting stoichiometry with post growth annealing, high-net free carrier density approaching 1018 cm-3 was attained simultaneously with lifetime approaching the radiative limit by suppressing non-radiative recombination centers.
- Authors:
-
- Washington State Univ., Pullman, WA (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Lab. (NREL), Golden, CO (United States); Washington State Univ., Pullman, WA (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
- OSTI Identifier:
- 1512683
- Alternate Identifier(s):
- OSTI ID: 1644037; OSTI ID: 1741033
- Report Number(s):
- NREL/JA-5K00-73893
Journal ID: ISSN 0361-5235
- Grant/Contract Number:
- AC36-08GO28308; EE0007537; EE0008548
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Electronic Materials
- Additional Journal Information:
- Journal Volume: 48; Journal Issue: 7; Journal ID: ISSN 0361-5235
- Publisher:
- Springer
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 14 SOLAR ENERGY; n-type CdTe; time resolved photoluminescence; carrier density; life time
Citation Formats
Swain, S. K., Duenow, J. N., Johnston, S. W., Amarasinghe, M., McCoy, J. J., Metzger, W. K., and Lynn, K. G. Approach to Defect-Free Lifetime and High Electron Density in CdTe. United States: N. p., 2019.
Web. doi:10.1007/s11664-019-07190-x.
Swain, S. K., Duenow, J. N., Johnston, S. W., Amarasinghe, M., McCoy, J. J., Metzger, W. K., & Lynn, K. G. Approach to Defect-Free Lifetime and High Electron Density in CdTe. United States. https://doi.org/10.1007/s11664-019-07190-x
Swain, S. K., Duenow, J. N., Johnston, S. W., Amarasinghe, M., McCoy, J. J., Metzger, W. K., and Lynn, K. G. Thu .
"Approach to Defect-Free Lifetime and High Electron Density in CdTe". United States. https://doi.org/10.1007/s11664-019-07190-x. https://www.osti.gov/servlets/purl/1512683.
@article{osti_1512683,
title = {Approach to Defect-Free Lifetime and High Electron Density in CdTe},
author = {Swain, S. K. and Duenow, J. N. and Johnston, S. W. and Amarasinghe, M. and McCoy, J. J. and Metzger, W. K. and Lynn, K. G.},
abstractNote = {Achieving simultaneously high carrier density and lifetime is crucial to II-VI semiconductor-based applications such as photovoltaics and infrared detectors; yet, it is a challenging task. In this work, high purity CdTe single crystals doped with indium (In) were grown by vertical Bridgman melt growth under carefully controlled stoichiometry. Two-photon excitation time-resolved photoluminescence was employed to measure bulk recombination lifetime by eliminating surface recombination effects. By adjusting stoichiometry with post growth annealing, high-net free carrier density approaching 1018 cm-3 was attained simultaneously with lifetime approaching the radiative limit by suppressing non-radiative recombination centers.},
doi = {10.1007/s11664-019-07190-x},
journal = {Journal of Electronic Materials},
number = 7,
volume = 48,
place = {United States},
year = {Thu Apr 11 00:00:00 EDT 2019},
month = {Thu Apr 11 00:00:00 EDT 2019}
}
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Works referencing / citing this record:
Final Report: Preparation and Evaluation of N-Type CdSeTe and CdTe as an Absorber in Thin Film PV
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