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Title: Arsenic doped Cd-rich CdTe: equilibrium doping limit and long lifetime for high open-circuit voltage solar cells greater than 900 mV

Journal Article · · Applied Physics Express
 [1];  [1];  [1]; ORCiD logo [2];  [3]
  1. Univ. of Miyazaki, Miyazaki (Japan)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Univ. of Utah, Salt Lake City, UT (United States)

The combination of group-V element doping and Cd-rich composition is the most promising current strategy for maximizing p-type doping while preserving long lifetime. In this study, we carefully measure the equilibrium p-type doping limit for As-doped Cd-rich CdTe single crystals and demonstrate a doping limit in the low 1017 cm–3 range upon slow cooling. Here, we present evidence for self-compensation with rapidly decreasing doping efficiency per added As above 5 × 1016 cm–3, yet we also demonstrate CdTe with >1017 cm–3 hole concentration and bulk lifetime >30 ns. Such crystals allow As-doped CdTe photovoltaic devices with open-circuit voltage exceeding 900 mV.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1526454
Report Number(s):
NREL/JA-5900-74157
Journal Information:
Applied Physics Express, Vol. 12, Issue 8; ISSN 1882-0778
Publisher:
Japan Society of Applied PhysicsCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

References (23)

Chemical trends of defect formation and doping limit in II-VI semiconductors: The case of CdTe journal October 2002
Dependence of the Minority-Carrier Lifetime on the Stoichiometry of CdTe Using Time-Resolved Photoluminescence and First-Principles Calculations journal August 2013
First-principles study of roles of Cu and Cl in polycrystalline CdTe journal January 2016
CdTe solar cells with open-circuit voltage breaking the 1 V barrier journal February 2016
Enhanced p-type dopability of P and As in CdTe using non-equilibrium thermal processing journal July 2015
Experimental and theoretical comparison of Sb, As, and P diffusion mechanisms and doping in CdTe journal January 2018
Self-compensation in arsenic doping of CdTe journal July 2017
p-type doping efficiency in CdTe: Influence of second phase formation journal April 2018
Overcoming Carrier Concentration Limits in Polycrystalline CdTe Thin Films with In Situ Doping journal September 2018
Long‐lifetime photoconductivity effect in n ‐type GaAlAs journal September 1977
Trapping characteristics and a donor-complex ( DX ) model for the persistent-photoconductivity trapping center in Te-doped Al x Ga 1 − x As journal January 1979
Growth and characterization of Arsenic doped CdTe single crystals grown by Cd-solvent traveling-heater method journal June 2017
Doping properties of cadmium-rich arsenic-doped CdTe single crystals: Evidence of metastable AX behavior journal December 2017
High p-type doping, mobility, and photocarrier lifetime in arsenic-doped CdTe single crystals journal May 2018
Minority Carrier Lifetime Analysis in the Bulk of Thin-Film Absorbers Using Subbandgap (Two-Photon) Excitation journal October 2013
Understanding arsenic incorporation in CdTe with atom probe tomography journal August 2018
Intrinsic surface passivation of CdTe journal October 2015
Radiative and interfacial recombination in CdTe heterostructures journal December 2014
Carrier density and lifetime for different dopants in single-crystal and polycrystalline CdTe journal November 2016
Time-resolved photoluminescence studies of CdTe solar cells journal September 2003
The roles of carrier concentration and interface, bulk, and grain-boundary recombination for 25% efficient CdTe solar cells journal June 2017
Solar cell efficiency tables (Version 53)
  • Green, Martin A.; Hishikawa, Yoshihiro; Dunlop, Ewan D.
  • Progress in Photovoltaics: Research and Applications, Vol. 27, Issue 1 https://doi.org/10.1002/pip.3102
journal December 2018
A comprehensive picture of Cu doping in CdTe solar cells journal November 2013

Figures / Tables (5)