2012 Fiscal Year Final Research Report
Development of high-efficiency Cu(InGa)Se2 thin-film solar cells fabricated by a nanoparticles based process
| Project/Area Number |
22360006
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Applied materials science/Crystal engineering
|
|---|
| Research Institution | Tokyo Institute of Technology |
|---|
Principal Investigator |
YAMADA Akira 東京工業大学, 大学院・理工学研究科, 教授 (40220363)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
KUROKAWA Yasuyoshi 東京工業大学, 理工学研究科, 助教 (00588527)
|
|---|
| Project Period (FY) |
2010 – 2012
|
| Keywords | 光物性 / 太陽電池 |
|---|
| Research Abstract |
In the research work, the fabrication process for Cu(InGa)Se2 (CIGS) solar cells has been developed by using a non-vacuum process, aiming at a realization of low-cost fabrication process for CIGS solar cells. In the process, nanoparticles were chemically synthesized, and then they were spray-printed/sintered to produce CIGS thin films. It was found that the Cu-In-Ga-Se nanoparticles caused small grain size and low crystallinity, resulting in low-efficiency solar cells. The crystallization velocity was increased and the large grain size was obtained when the Cu-Se and In-Se nanoparticles were used as the starting materials. Furthermore, a new approach for the quality improvement of CIS film has been developed, that is, thiourea has been applied as a binding agent and a sintering additive for the fabrication of high-quality CIS film. The fabricated CIS film exhibited a denser and larger-grain-size layer compared with the CIGS film fabricated using Cu-In-Ga-Se nanoparticles. Finally,a CIS solar cell with an efficiency of 3.5% has been successfully fabricated.
|
