|
Type |
Poster Presentation |
Area |
고분자화학 |
Room No. |
포스터발표장 |
Time |
4월 21일 (금요일) 13:00~14:30 |
Code |
POLY.P-13 |
Subject |
Highly efficient perovskite solar cells with long-term stability using dopant-free polymeric hole transporting materials |
Authors |
강경호, 박태호* POSTECH 화학공학과, Korea |
Abstract |
Hole transporting materials (HTMs) must be further developed to achieve high power conversion efficiency and stability in perovskite solar cells. We report a novel D–A polymeric HTM based on benzo[1,2-b:4,5:b']dithiophene (BDT) and 2,1,3-benzothiadiazole (BT), which results in highly efficient and stable perovskite solar cells. The hole mobility of synthesized polymeric HTM,RCP was 3.09 x 10^-3 cm^2 V^-1 s^-1 without any dopants. The RCP-based perovskite solar cell exhibits the highest efficiency (17.3%) in the absence of dopants [lithium bis(trifluoromethanesulfonyl)imide and tert-butylpyridine]. In addition, the long-term stability of the device is dramatically improved by avoiding deliquescent or hygroscopic dopants and by introducing a hydrophobic polymer layer. RCP devices maintain their initial efficiency for over 1400 h at 75% humidity, whereas devices made of HTMs with additives fail after 900 h. |
E-mail |
kang7@postech.ac.kr |
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