A novel chlorinated small molecule donor for efficient binary and ternary all-small-molecule organic solar cells
作者:Chunyan Liu、Lihua Liu、Nailiang Qiu、Xiangjian Wan、Chenxi Li、Yan Lu
DOI:10.1016/j.orgel.2022.106532
日期:2022.7
A new acceptor-donor-acceptor (A-D-A) type small molecule donor named BTEHR-CT has been developed, taking the chlorothienyl-substituted benzodithiophene (BDT) as the central unit and 3-(2-ethylhexyl)rhodanine as the terminal group. BTEHR-CT shows a low-lying highest occupied molecular orbital (HOMO) level of −5.56 eV and the suitable molecular aggregation benefiting from the introduction of chlorine
以氯噻吩基取代的苯并二噻吩(BDT)为中心单元,3-(2-乙基己基)罗丹宁为末端基团,研制了一种新型的受体-供体-受体(ADA)型小分子供体BTEHR-CT。BTEHR-CT显示出-5.56 eV的低位最高占据分子轨道(HOMO)能级和受益于氯原子的引入的合适的分子聚集,这有助于实现优异的光伏性能。基于高效的非富勒烯受体 F-2Cl,优化后的二元器件具有 11.13% 的高功率转换效率 (PCE),开路电压 ( Voc ) 为0.946 V,短路电流密度 ( Jsc ) ) 的 17.05 mA cm -2和 0.690 的 FF。随着 PC 71 BM 的加入,基于 BTEHR-CT:F–2Cl:PC 71 BM(重量比为 1:0.8:0.2)的三元共混膜显示出具有合适的畴尺寸和溶剂蒸汽后有利的相分离的纤维形态退火 (SVA) 处理,产生 18.53 mA cm -2的优异J sc填充因子
A high-performance photovoltaic small molecule developed by modifying the chemical structure and optimizing the morphology of the active layer
High performance organic solar cell (8.26% PCE) developed through modifying the chemical structure of molecule and optimizing the morphology of active layer.
申请人:KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGY 한국화학연구원(319980077651)
公开号:KR20150069119A
公开(公告)日:2015-06-23
본 발명은 신규한 유기 반도체 화합물, 이의 제조방법 및 이를 함유한 유기 전자 소자를 제공하며, 상기 유기 반도체 화합물은 전정색 영역의 흡수 스펙트럼을 가짐으로써 광자를 폭넓게 흡수할 수 있는 장점을 가져 이를 포함하는 유기 전자 소자의 광전변환재료로 유용하게 사용할 수 있다.
Asymmetricsubstitution of end-groups is first applied in molecular donors. Three commonly used end-groups of 2-ethylhexyl cyanoacetate (CA), 2-ethylhexyl rhodanine (Reh), and 1H-indene-1,3(2H)-dione (ID) are combined to construct a series of symmetric and asymmetric donors. Correspondingly, the asymmetric donors SM-CA-Reh and SM-CA-ID show largely increased dipole moments (2.14 and 3.39 D, respectively)