2023 Fiscal Year Final Research Report
Engineering the intermediate band of highly mismatched alloys for improving the interband transitions
| Project/Area Number |
20K05682
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 36020:Energy-related chemistry
|
|---|
| Research Institution | The University of Electro-Communications (2022-2023)
The University of Tokyo (2020-2021) |
|---|
Principal Investigator |
Miyashita Naoya 電気通信大学, 大学院情報理工学研究科, 准教授 (20770788)
|
|---|
| Project Period (FY) |
2020-04-01 – 2024-03-31
|
| Keywords | 希釈窒化物半導体 / III-V族化合物半導体 / 太陽電池 / マルチバンド材料 |
|---|
| Outline of Final Research Achievements |
This research focused on the engineering of the MQW structures based on the dilute nitrides, GaInNAs, aiming at improving the 2-step photon excitation and relaxation to the intermediate band. It was shown that applying the MQWs suppressed the relaxation of the photo-carriers. In addition, widegap AlGaAs barriers were structurally more stable than GaAs, and using AlGaAs enhanced optical transition via the intermediate band.
|
| Free Research Field |
半導体工学
|
| Academic Significance and Societal Importance of the Research Achievements |
理論変換効率60%超の中間バンド型太陽電池の実現に向けた最重要課題である、2段階励起レート向上と再緩和抑制に向けたマルチバンド材料・構造の検討を行った。本研究では、構造エンジニアリングの点で自由度の高い多重量子井戸構造に着目し、上記課題に関し改善効果を確認した。結晶性改善効果が期待されるアニールに対する構造安定性の面でも優位性があり、今後効率の向上につながることが期待できる成果であると考えられる。
|
