High work function MoO2 back contacts for improved solar cell performance
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
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