| 학회 |
한국재료학회 |
| 학술대회 |
2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 |
27권 2호 |
| 발표분야 |
B. 나노화학/바이오 재료 분과 |
| 제목 |
Colloidal deposition of colored daytime radiative cooling films using nanoparticle-based inks |
| 초록 |
In this study, we fabricated easily applicable and processible colored passive daytime radiative cooling (PDRC) films using a solution process with colloidal nanoparticle-based inks. White PDRC films were prepared using hollow silica nanoparticle (H–SiO2)-based colloidal inks and polymeric binders and spray coating. Hollow silica nanoparticles were synthesized by annealing encapsulated materials consisting of an n-octadecane core and a silica shell at high temperature. We also fabricated colored PDRC films by depositing Cu-based quantum dots (QDs) on white PDRC films. The Cu-based QDs partially absorb light in the visible spectrum, allowing yellow, red, and brown colors, that are highly efficient in preventing heat generation. The absorbed energy is converted into another wavelength and emitted as photons based on the photoluminescence effect. The Cu-based QDs were synthesized by synthesizing a core by reacting each precursor at a high temperature, and then forming a shell by a slow injection method. The synthesized core/shell structure QDs showed high PLQY of 80% or more and showed excellent stability. Furthermore, we numerically and experimentally determined the daytime cooling performance of two brown PDRC films with different quantum efficiencies. Our results confirm that these easily processable colored PDRC films are more efficient daytime cooling than commercial paint color films on various substrates. |
| 저자 |
윤태열1, 손수민2, 민석환3, 채동우2, 우호영1, 채지연1, 임한규2, 백태종1, 이헌2
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| 소속 |
1중앙대, 2고려대, 3카이스트 |
| 키워드 |
<P>Nanoparticle; Colloid; Quantum dot; Ternary semiconductor; Nanoparticle-ink coating</P>
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| E-Mail |
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