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Title: High work function MoO2 back contacts for improved solar cell performance

Abstract

Improved high work function back contacts for solar cells are provided. In one aspect, a method of forming a solar cell includes: forming a completed solar cell having a substrate coated with an electrically conductive material, an absorber disposed on the electrically conductive material, a buffer layer disposed on the absorber, a transparent front contact disposed on the buffer layer, and a metal grid disposed on the transparent front contact; removing the substrate and the electrically conductive material using exfoliation, exposing a backside surface of the solar cell; depositing a high work function material onto the back side surface of the solar cell; and depositing a back contact onto the high work function material. A solar cell formed by the present techniques is also provided. Yield of the exfoliated device can be improved by removing bubbles from adhesive used for exfoliation and/or forming contact pads to access the metal grid.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
International Business Machines Corp., Armonk, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1632479
Patent Number(s):
10541346
Application Number:
15/425,717
Assignee:
International Business Machines Corporation (Armonk, NY)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
EE0006334
Resource Type:
Patent
Resource Relation:
Patent File Date: 02/06/2017
Country of Publication:
United States
Language:
English

Citation Formats

Antunez, Priscilla D., Bishop, Douglas M., Fraczak, Gloria W., Gunawan, Oki, and Haight, Richard A. High work function MoO2 back contacts for improved solar cell performance. United States: N. p., 2020. Web.
Antunez, Priscilla D., Bishop, Douglas M., Fraczak, Gloria W., Gunawan, Oki, & Haight, Richard A. High work function MoO2 back contacts for improved solar cell performance. United States.
Antunez, Priscilla D., Bishop, Douglas M., Fraczak, Gloria W., Gunawan, Oki, and Haight, Richard A. Tue . "High work function MoO2 back contacts for improved solar cell performance". United States. https://www.osti.gov/servlets/purl/1632479.
@article{osti_1632479,
title = {High work function MoO2 back contacts for improved solar cell performance},
author = {Antunez, Priscilla D. and Bishop, Douglas M. and Fraczak, Gloria W. and Gunawan, Oki and Haight, Richard A.},
abstractNote = {Improved high work function back contacts for solar cells are provided. In one aspect, a method of forming a solar cell includes: forming a completed solar cell having a substrate coated with an electrically conductive material, an absorber disposed on the electrically conductive material, a buffer layer disposed on the absorber, a transparent front contact disposed on the buffer layer, and a metal grid disposed on the transparent front contact; removing the substrate and the electrically conductive material using exfoliation, exposing a backside surface of the solar cell; depositing a high work function material onto the back side surface of the solar cell; and depositing a back contact onto the high work function material. A solar cell formed by the present techniques is also provided. Yield of the exfoliated device can be improved by removing bubbles from adhesive used for exfoliation and/or forming contact pads to access the metal grid.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {1}
}

Patent:

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