Multi-junction solar cell structure
AssigneeSolapoint Corporation
InventorsChan Shin WU, Tsung-Pei CHIN, Yung-Yi TU
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Abstract
A multi-junction solar cell structure includes a supporting substrate, a Group IV element-based thin film, and a Group III-V element-based thin film sequentially stacked on the supporting substrate. When the multi-junction solar cell structure is active, the Group III-V element-based thin film contacts the light before the Group IV element-based thin film does. The Group IV element-based thin film includes a first solar cell and the Group III-V element-based thin film includes a second solar cell, wherein the band gap of the first solar cell is lower than the band gap of the second solar cell.
Claims13
A multi-junction solar cell structure, comprising:
- a supporting substrate;
- a Group IV element-based thin film on the supporting substrate, the Group IV element-based thin film having a first solar cell;
- a Group III-V element-based thin film on the Group IV element-based thin film, wherein the Group III-V element-based thin film is determined to contact the light before the Group IV element-based thin film does, the Group III-V element-based thin film having a second solar cell,
- wherein the band gap of the first solar cell is lower than the band gap of the second solar cell.
A method of forming a multi-junction solar cell structure, comprising:
- providing a growth substrate;
- growing a peeling layer on the growth substrate;
- growing a Group III-V element-based thin film on the peeling layer, the Group III-V element-based thin film having a second solar cell;
- growing a Group IV element-based thin film on Group III-V element-based thin film, the Group IV element-based thin film having a first solar cell,
- wherein the band gap of the first solar cell is lower than the band gap of the second solar cell, and the Group III-V element-based thin film is determined to contact the light before the Group IV element-based thin film does;
- providing a supporting substrate to support the Group IV element-based thin film and the Group III-V element-based thin film;
- and
- removing the peeling layer to detach the growth substrate.
Dependencies are inferred from the claim text.