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:
- 1823976
- Patent Number(s):
- 11011661
- Application Number:
- 16/741,577
- 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: 01/13/2020
- 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., 2021.
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/1823976.
@article{osti_1823976,
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 = {2021},
month = {5}
}
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