Technique for achieving large-grain Ag.sub.2ZnSn(S,Se).sub.4thin films

Gershon, Talia S.; Gordon, Michael S.; Lee, Yun Seog

Title: Technique for achieving large-grain Ag.sub.2ZnSn(S,Se).sub.4thin films

Patent · Tue Sep 18 00:00:00 EDT 2018

OSTI ID:1482822

Gershon, Talia S.; Gordon, Michael S.; Lee, Yun Seog

Techniques for increasing grain size in AZTSSe absorber materials are provided. In one aspect, a method for forming an absorber film on a substrate includes: contacting the substrate with an Ag source, a Zn source, a Sn source, and an S source and/or an Se source under conditions sufficient to form the absorber film on the substrate having a target composition of: Ag.sub.XZn.sub.YSn(S,Se).sub.Z, wherein 1.7<2.2, 0.9<1.3, and 3.5<4.5, and including an amount of the Ag source that is from about 10% to about 30% greater than is needed to achieve the target composition; annealing the absorber film; and removing excess Ag from the absorber film. A solar cell and method for fabrication thereof are also provided.

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Research Organization:: International Business Machines Corp., Armonk, NY (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: EE0006334

Assignee:: International Business Machines Corporation (Armonk, NY)

Patent Number(s):: 10,079,321

Application Number:: 15/198,795

OSTI ID:: 1482822

Resource Relation:: Patent File Date: 2016 Jun 30

Country of Publication:: United States

Language:: English

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