| 세션명 | Virtual Lightning Talk Session |
|---|---|
| 발표장 | 온라인 |
| 논문코드 | VLT-42 |
| 발표일 | --2023 |
| 발표시간 | 2024-04-03~04-07 |
| 논문제목 | Morphology control in Planar Heterojunctions through PCBM diffusion induced by thermal annealing treatment |
| 발표자 | 김유리 |
| 발표자 소속 | 부산대학교 이택호 교수님 연구실 |
| 저자 | 김유리, 이택호1,† |
| 소속 | 부산대학교 이택호 교수님 연구실; 1부산대학교 화학소재학과 |
| 논문초록 | PCBM diffusion has previously been studied in relation to thermal stability in bulk heterojunction (BHJ) states. In BHJ, the diffusion of PCBM reduces the concentration of PCBM in the mixture, which reduces the appropriate permeation and efficiency. Conversely, in this study, we have attempted to increase the percolation in the PHJ by diffusing PCBM into the polymer donor matrix by sequentially placing the demixed active layer films and subjecting them to thermal annealing. Initially, as PCBM diffused, additional percolation pathways were created. This increased carrier mobility and short-circuit current density, thereby improving efficiency. However, after a period, degradation losses increased, leading to performance degradation. While we attempted additional control of the morphology after film formation, taking advantage of the ability of the PHJ to control the vertical distribution, we confirmed that there are limitations to the diffusion of small molecules into the already formed donor-acceptor interface. |
THE POLYMER SOCIETY OF KOREA