| 학회 |
한국공업화학회 |
| 학술대회 |
2019년 봄 (05/01 ~ 05/03, 부산 벡스코(BEXCO)) |
| 권호 |
23권 1호 |
| 발표분야 |
신진과학자포럼 |
| 제목 |
Facet-Specific Passivation of Colloidal Quantum Dots Enables Improved Infrared Solar Cells |
| 초록 |
Narrow-bandgap PbS colloidal quantum dots (CQDs) provide the attractive opportunity of utilizing the unharvested infrared (IR) solar energy that is transmitted through silicon photovoltaic cells. We demonstrate a novel strategy for facet-specific passivation on (100) and (111) facets of narrow-bandgap CQDs via solution-phase ligand exchange, enabling the highly-passivated and colloidally-stable CQD inks. Our new strategy results in the significantly decreased CQD aggregations as well as the improved photophysical properties. As a result, the resultant CQD solids exhibit the highly enhanced solar cell performance under full solar spectrum and beyond 1100 nm. Considering the surface structure of various colloidal nanocrystals is different and complicated according to the crystal size determined during the synthesis, we believe that our approach opens up a versatile and facile way of achieving further improvements in nanocrystal-based optoelectronic devices. |
| 저자 |
김영훈 |
| 소속 |
대구경북과학기술원 (DGIST) |
| 키워드 |
Colloidal quantum dots; passivation; solar cells; infrared
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| E-Mail |
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