| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO)) |
| 권호 |
44권 1호 |
| 발표분야 |
대학원생 구두발표 (영어발표, 발표15분) |
| 제목 |
Morphology and charge recombination effects on the performance of nearinfrared photodetectors based on conjugated polymers |
| 초록 |
Near-infrared (NIR) photodetectors were fabricated through a solution process using two different conjugated polymers (CPs) that share a similar backbone consisting of a DPP moiety. However, their detection capabilities were significantly different depending on the applied linkers, namely thiophene for PDPP-T and fluorinated thiophene for PDPP-FBT. First, we revealed that employing an additive was beneficial to optimize film morphology for both CPs, suppressing dark current and enhancing detectivity. Additionally, it was clearly demonstrated via transient photovoltage measurements that the charge recombination time was lengthened by introducing a highly electronegative fluorine atom into the conjugated skeleton, which implies an increase in the probability of charge extraction. Conclusively, both film morphology and surface dipoles of CPs are equally important to achieve high detectivity and responsivity in organic NIR photodetectors. |
| 저자 |
강영권, 김봉기, 박재홍, 계효진, 이인규, 김민선
|
| 소속 |
건국대 |
| 키워드 |
Ner-infrared photodetector; conjugated polymers; charge recombination
|
| E-Mail |
|
