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Title: Surface passivation for CdTe devices

Patent ·
OSTI ID:1373708

In one embodiment, a method for surface passivation for CdTe devices is provided. The method includes adjusting a stoichiometry of a surface of a CdTe material layer such that the surface becomes at least one of stoichiometric or Cd-rich; and reconstructing a crystalline lattice at the surface of the CdTe material layer by annealing the adjusted surface.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC36-08GO28308
Assignee:
Alliance for Sustainable Energy, LLC
Patent Number(s):
9,722,111
Application Number:
14/615,282
OSTI ID:
1373708
Resource Relation:
Patent File Date: 2015 Feb 05
Country of Publication:
United States
Language:
English

References (14)

Digital electrochemical etching of compound semiconductors patent January 1995
Production of clean, well-ordered CdTe surfaces using laser ablation patent October 1995
Use of separate ZnTe interface layers to form OHMIC contacts to p-CdTe films patent June 1999
Method of producing photoelectric conversion device patent June 1999
Ion-beam treatment to prepare surfaces of p-CdTe films patent August 2001
Plasma & reactive ion etching to prepare ohmic contacts patent October 2002
CdTe devices and method of manufacturing same patent September 2015
Controlling the stoichiometry and doping of semiconductor materials patent August 2016
Dependence of the Minority-Carrier Lifetime on the Stoichiometry of CdTe Using Time-Resolved Photoluminescence and First-Principles Calculations journal August 2013
Photoemission studies of CdTe(100) and the Ag-CdTe(100) interface: Surface structure, growth behavior, Schottky barrier, and surface photovoltage journal November 1986
Polycrystalline CdTe thin films for photovoltaic applications journal December 2006
Time-resolved photoluminescence studies of CdTe solar cells journal September 2003
Luminescence effects of ion-beam bombardment of CdTe surfaces journal September 2009
Surface passivation by sulfur treatment of undoped p-CdTe(100) journal August 2000

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