연구
Research Outcome
미래를 창조하는 포스텍 화학공학과
Green Solvent Processable, Dopant-Free Hole Transport Materials for Robust and Efficient Perovskite Solar Cells
- Title of paper
- Green Solvent Processable, Dopant-Free Hole Transport Materials for Robust and Efficient Perovskite Solar Cells
- Author
- [박태호교수 연구실]
- Publication in journal
- Journal of The American Chemical Society 2017, 139 (35), pp 12175–12181
- Publication date
- 20170816
[abstract]
In addition to having proper energy levels and high hole mobility (μh) without the use of dopants, holetransporting materials (HTMs) used in n-i-p-type perovskite solar cells (PSCs) should be processed using green solvents to enable environmentally friendly device fabrication. Although many HTMs have been assessed, due to the limited solubility of HTMs in green solvents, no green-solvent-processable HTM has been reported to date. Here, we report on a greensolvent-processable HTM, an asymmetric D−A polymer (asy-PBTBDT) that exhibits superior solubility even in the green solvent, 2-methylanisole, which is a known food additive. The new HTM is well matched with perovskites in terms of energy levels and attains a high μh (1.13 × 10−3 cm2/(V s)) even without the use of dopants. Using the HTM, we produced robust PSCs with 18.3% efficiency (91% retention after 30 days without encapsulation under 50%−75% relative humidity) without dopants; with dopants (bis(trifluoromethanesulfonyl) imide and tertbutylpyridine, a 20.0% efficiency was achieved. Therefore, it is a first report for a green-solvent-processable hole-transporting polymer, exhibiting the highest efficiencies reported so far for n-i-p devices with and without the dopants.
DOI: 10.1021/jacs.7b04949
37673 경북 포항시 남구 청암로 77 포항공과대학교 화학공학과 (환경공학동) ㅣ전화 : 054-279-2720 ㅣ팩스 : 054-279-5528
Copyright © chemical engineering. All rights reserve
본 사이트는 IE 상위버전에 최적화 되어있습니다.