2020 Fiscal Year Research-status Report
Quantum-Assisted Photoelectric Effects in Perovskite Solar Cells
| Project/Area Number |
20K15135
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
王 映樵 国立研究開発法人物質・材料研究機構, 若手国際研究センター, ICYS研究員 (60838035)
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | perovskite solar cell / photodetector / quantum dot / nanosheet / Photovoltaics / Energy conversion / UV / stability |
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| Outline of Annual Research Achievements |
During this first fiscal year, I published 3 articles based on this JSPS-KAKENHI plan. Firstly, by adding silicon quantum dots (SiQDs) to the perovskite solar cell (PSC), the photocurrent of the PSC is greatly improved. Since SiQD can convert UV light into visible light that can be absorbed by perovskite, the efficiencies increased from 18.2% to 19.6% (NPG Asia Mater., 2020, 12, 54)[featured Article]. Moreover, we used an iron-based coordination nanosheet (CONASH) as UV light harvesters and then prepared the CONASH self-powered UV photodetectors, showing an ultrahigh air stability. (Adv. Sci., 2021, DOI: 10.1002/advs.202100564). Finally, we also analyze the fullerene-induced photocarrier dynamics in PSCs by pump-probe transient absorption spectroscopy (J. Mater. Chem. A, 2020, 8, 23607).
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
The expected experimental progress for this fiscal year is that I will complete the synthesis and characterization of silicon quantum dots (SiQD). Then, I will introduce SiQDs into perovskite solar cell (PSCs). Through the SiQD-assisted sunlight harvesting methods, UV light and unabsorbed visible light may be effectively utilized by PSCs, achieving a high photocurrent, and these phenomena will be economically beneficial to low-purity perovskite-b ased PSCs, with the impressive efficiency boost. I have completed and published all the above experiments in NPG Asia Mater., 2020, 12, 54.
In addition, I have developed additional quantum material-based photodetectors and used pump-probe transient absorption spectroscopy for measuring carrier dynamics.
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| Strategy for Future Research Activity |
In the next fiscal year, after finish the experiment of silicon quantum dot-based perovskite solar cells (PSCs), I will continue to introduce the coordination nanosheet (CONASH) into PSCs. It is expected that quantum functions contributed by CONASH will be obtained in PSCs. On the other hand, quantum materials can economically assist perovskite light absorbing layer to obtain additional photocurrent gains in an ultra-w ide wavelength range, thereby improving the efficiency of PSCs regardless of the use of high quality or impurity-rich perovskite crystals. The advanced research proposal demonstrates that the reasonable-cost and smart material, silicon quantum dot and CONASH, opens up a unique strategy to the marketization of PSCs.
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| Causes of Carryover |
I will use it to purchase chemicals and consumables.If the epidemic subsides, I will use some of the funds to attend international seminars.
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