Naphthalene diimide-based random terpolymers with axisymmetric and asymmetric electron acceptors for controllable morphology and enhanced fill factors in all-polymer solar cells

被引:0
作者
Park, Geunhyung [1 ]
Cho, Yongjoon [1 ,5 ,6 ]
Lee, Seunglok [1 ]
Kim, Seungju [4 ]
Lee, Kyu Cheol [3 ,4 ]
Yang, Changduk [1 ,2 ]
机构
[1] Ulsan Natl Inst Sci & Technol UNIST, Perovtron Res Ctr, Low Dimens Carbon Mat Ctr, Sch Energy & Chem Engn, 50 UNIST Gil, Ulsan 44919, South Korea
[2] Ulsan Natl Inst Sci & Technol UNIST, Grad Sch Carbon Neutral, 50 UNIST Gil, Ulsan 44919, South Korea
[3] Dong Eui Univ, Dept Appl Chem, Div Chem Environm Engn, 176 Eomgwangro, Busan 47340, South Korea
[4] Dong Eui Univ, Dept Appl Chem Food Sci Technol, 176 Eomgwangro, Busan 47340, South Korea
[5] Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA
[6] Northwestern Univ, Mat Res Ctr, 2145 Sheridan Rd, Evanston, IL 60208 USA
基金
新加坡国家研究基金会;
关键词
ORGANIC SEMICONDUCTORS; COPOLYMER ACCEPTORS; CONJUGATED POLYMERS; FULLERENE-POLYMER; PERFORMANCE; RECOMBINATION; EFFICIENCY; CRYSTALLINITY; PHOTOVOLTAICS; PHOTOPHYSICS;
D O I
10.1039/d3cp00998j
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
All-polymer solar cells (all-PSCs), based on p-type polymer donors and n-type acceptors as the active layer, offer exceptional promise because of excellent thermal stability, superior film formation, and good mechanical stress as a unique bulk heterojunction (BHJ) solar cell combination. Therefore, tuning the molecular composition between polymers is crucial for optimizing power conversion efficiency (PCE) in these all-PSC systems. In this study, we synthesized a series of naphthalene diimide (NDI)-based random terpolymers P(NDI-BDD10), P(NDI-TPD10), P(NDI-TT10), and P(NDI-2FQ10) with axisymmetric (BDD, TPD) and asymmetric (TT, 2FQ) electron acceptors. Compared with the blend morphology of PBDB-T:N2200, their diverse effects due to the addition of trace amounts of axisymmetric and asymmetric components were comprehensively investigated using physical and surface analyses and structural simulations. Consequently, most of our polymer acceptors demonstrated improved fill factors (FFs) in the optimal morphology. P(NDI-BDD10)-based devices achieved the highest PCE of 6.80% and FF of 69.1%, while the architecturally most asymmetric P(NDI-TT10)-based devices reached the lowest PCE of 4.52% despite an enhanced FF of 65.4%. As a result, the appropriate molecular arrangement is crucial for obtaining the desired morphology and improved PCE. Our findings give novel molecular design insight into the distinctions between axisymmetric and asymmetric electron acceptors and seem significant for achieving improved morphological features and efficiency.
引用
收藏
页码:17001 / 17009
页数:9
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