Ternary Organic Solar Cells by Small Amount of Efficient Light Absorption Polymer PSEHTT as Third Component Materials

被引:2
|
作者
Zhang, Han [1 ]
Jia, Songrui [2 ,3 ,4 ]
Liu, Zhiyong [1 ,5 ,6 ]
Chen, Zheng [2 ,3 ,4 ]
机构
[1] Yunnan Normal Univ, Inst Phys & Elect Informat, Kunming 650500, Peoples R China
[2] Jilin Univ, Coll Chem, Natl & Local Joint Engn Lab Synthet Technol High P, Changchun 130012, Peoples R China
[3] Jilin Univ, Coll Chem, Engn Res Ctr Special Engn Plast, Minist Educ, Changchun 130012, Peoples R China
[4] Jilin Univ, Coll Chem, Key Lab High Performance Plast, Minist Educ, Changchun 130012, Peoples R China
[5] Yunnan Key Lab Optoelect Informat Technol, Kunming 650500, Peoples R China
[6] Yunnan Normal Univ, Key Lab Adv Tech & Preparat Renewable Energy Mat, Minist Educ, Kunming 650500, Peoples R China
来源
MOLECULES | 2023年 / 28卷 / 19期
关键词
ternary OSCs; light absorption; exciton dissociation; carrier recombination; PERFORMANCE;
D O I
10.3390/molecules28196832
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
We prepared ternary organic solar cells (OSCs) by incorporating the medium wavelength absorption polymer PSEHTT into the PM6:L8-BO binary system. The power conversion efficiency (PCE) is improved from 15.83% to 16.66%. Although the fill factor (FF) is slightly reduced, the short-circuit current density (JSC) and open-circuit voltage (VOC) are significantly increased at the same time. A small amount of PSEHTT has a broad absorption spectrum in the short wavelength region and has good compatibility with PM6, which is conducive to fine-tuning the photon collection and improving the JSC. In addition, the highest occupied molecular orbital (HOMO) energy level of PSEHTT is deeper than that of PM6, which broadens the optical bandgap. This study provides an effective method to fabricate high-performance ternary OSCs by using a lower concentration of PSEHTT with PM6 as a hybrid donor material, which ensures a better surface and bulk morphology, improves photon collection, and broadens the optical bandgap.
引用
收藏
页数:12
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