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

Patent ·
OSTI ID:1823976
; ; ; ;

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.

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):
11,011,661
Application Number:
16/741,577
OSTI ID:
1823976
Resource Relation:
Patent File Date: 01/13/2020
Country of Publication:
United States
Language:
English

References (20)

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Method for Manufacturing Transparent Electrode patent-application January 2017
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Optoelectronic Apparatus and Fabrication Method of the Same patent-application January 2016
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Patterning by Stamped Metal Resist patent-application April 2010
Exfoliating method, transferring method of thin film device, and thin film device, thin film integrated circuit device, and liquid crystal display device produced by the same patent November 2004
Method for Enhancing Conductivity of Molybdenum Thin Film by Using Electron Beam Irradiation patent-application April 2015
Particle-Based Precursor Formation Method and Photovoltaic Device Thereof patent-application February 2013
Thin-Film Solar Cell Having a Molybdenum-Containing Back Electrode Layer patent-application October 2010
Method for Producing a Solar Cell Having a Textured Front Face and Corresponding Solar Cell patent-application June 2013
Back Contact Work Function Modification for Increasing CZTSSe Thin Film Photovoltaic Efficiency patent-application October 2013
Substrate-Free Thin-Film Flexible Photovoltaic Device And Fabrication Method patent-application July 2016
Process for Preparing a Metal Film on a Substrate patent-application February 2009
Transparent conducting layer for solar cell applications patent-application June 2013
Fabrication of CuZnSn(S,Se) Thin Film Solar Cell with Valve Controlled S and Se patent-application April 2012
Ohmic Contact of Thin Film Solar Cell patent-application January 2014
Solar Cell or Tandem Solar Cell and Method of Forming Same patent-application December 2014
Structure and method of fabricating a CZTS photovoltaic device by electrodeposition patent April 2013

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