International Business Machines Corporation

Gloria W Fraczak

Oki Gunawan

Richard Alan Haight

Douglas M Bishop

Priscilla D Antunez

Hiroyuki Miyazoe

Robert L Bruce

Fabio Carta

Kumar R Virwani

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.

High work function MoO2 back contacts for improved solar cell performance

A combined semiconductor device is fabricated by forming a first access structure from a mixed ionic electronic conduction (MIEC) material. A first side of a first memory structure is electrically coupled with a first side of the first access structure to form the combination device. A subtractive etching process is applied to the combination device such that a surface of the combination device that is substantially orthogonal to a plane of a substrate of the semiconductor device is within a defined tapering tolerance.

Access device and phase change memory combination structure in backend of line (BEOL)

High work function MoOback contacts for improved solar cell performance

Growing community of inventors

Bellerose, NY, United States of America

Gloria W Fraczak