| 세션명 | 대학원생 구두발표(토론I): 포스트 분자전자 소재와 소자 기술 |
|---|---|
| 발표장 | 제8-1회장 |
| 논문코드 | OD1-2 |
| 발표일 | 2024-04-3 |
| 발표시간 | 13:10-13:20 |
| 논문제목 | Suppression of Thermally Induced In-gap Traps in Colloidal Quantum Dot Solids via Pulsed Light |
| 발표자 | 이언지 |
| 발표자 소속 | 대구경북과학기술원 |
| 저자 | 이언지, 이원종1, 윤태호2, 임종철1, 임창용2, 최종민† |
| 소속 | 대구경북과학기술원; 1충남대학교; 2경북대학교 |
| 논문초록 | To enhance the performance of colloidal quantum dot solar cells, annealing is employed to improve the electrical conductivity of quantum dot films. This process increases the packing density of the film and aids in the removal of residues and solvents. However, conventional thermal annealing procedures expose the film to heat for long durations, ranging from minutes to tens of minutes. This prolonged exposure can lead to hydroxylation and oxidation of the surface of quantum dots, forming trap states within the bandgap and consequently reducing the photovoltaic device's power conversion efficiency (PCE). To address this issue, this study introduces flash lamp annealing, which operates on a millisecond scale. Through this method, charge transport properties are maintained while trap states are significantly reduced, thereby enhancing the PCE of solar cells. As a result, the open-circuit voltage increased to 0.66 V compared to 0.63 V for the control, improving PCE from 12.71% to 13.50%. |
THE POLYMER SOCIETY OF KOREA