2018 Fiscal Year Annual Research Report
ゼロ次元ペロブスカイト量子ハイブリッドを用いた高効率陽電池に関する研究
| Project/Area Number |
17F17815
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
Svrcek Vladimir 国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 主任研究員 (80462828)
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| Co-Investigator(Kenkyū-buntansha) |
MCDONALD CALUM 国立研究開発法人産業技術総合研究所, 太陽光発電研究センター, 外国人特別研究員
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| Project Period (FY) |
2017-11-10 – 2020-03-31
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| Keywords | solar cells / nanocrystals |
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| Outline of Annual Research Achievements |
We study the organometal methylammonium iodobismuthate (MABI) with the chemical formula (CH3NH3)3Bi2I9. This fiscal year the MABI nanocrystals synthesise will be optimized to achieve the ideal absorption gap for solar cell around 1.6 eV. The phase changes of MABI nanocrystals as a function of temperature will be investigated. Detailed TEM and XRD will be used to determine the crystalline structure of nanocrystals. Corresponding prototype solar cell devices will be fabricated based on MABI nanocrystals with different crystalline phase.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
We have successfully synthesised of MABI nanocrystals with quantum confinement size less than 5 nm and discovered phase changes as function of synthesize temperature. . We have evaluated structural and optoelectric properties of the nanocrystals. Observed the changes in energy band gap as a function of the phase. We fabricated MABI solar cells and characterized its by measuring of the current voltage characteristics and external quantum efficiency under 1 sun irradiation. We could observe changes in photovoltaic characteristics of the solar cells a s function of the MABI nanocrystal phase. Hybrids of combination of MABI nanocrystals and p-/n-type silicon nanocrystals were explored however expected significant increase in the carrier transport through assisted exciton dissociation was not observed, unfortunately.
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| Strategy for Future Research Activity |
We will continue our study in same direction as in previous year, namely MABI nanocrystals with strong quantum confinement will be synthesised. Optimization of the crystalline phase dependence synthesis process by combination of the dry and solution will be persuaded. Structural and optoelectric properties of newly synthesized nanocrystals will be determined and size, crystalline structure will be confirmed. Corresponding single junction prototype solar cell devices will be fabricated based and characterized under deferment excitation intensities to reveal contribution of quantum confinement effect for carrier generation.
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