An angular-shaped 4,9-didodecylnaphthodithiophene-based octacyclic ladder-type structure was developed. This new ladder-type donor (LD) was coupled with electron-withdrawing IC and FIC units to form two A-LD-A type non-fullerene acceptor materials, NCIC and NCFIC. NCIC and NCFIC as the n-type acceptors are blended with a p-type donor PBDB-T to form the complementary absorption and suitable energy level alignments. The binary-blend PBDB-T:NCIC and PBDB-T:NCFIC devices achieved an efficiency of 7.3% and 7.5%, respectively. PC₇₁BM was incorporated to form D₁:A₁:A₂ ternary blends which further strengthen the absorption at shorter wavelengths. Introduction of PC₇₁BM not only efficiently improves the absorption but also provides multiple channels for exciton dissociation and electron transport to dramatically improve J_sc. It is interesting to find that the V_oc of the ternary-blend devices is reversely in proportional to the added amount of PC₇₁BM. The device using the PBDB-T:NCIC:PC₇₁BM (1:1:1 in wt %) showed an improved PCE of 8.32%. Moreover, the optimized device using the PBDB-T:NCFIC:PC₇₁BM (1:1:1.5 in wt %) blend achieved the highest efficiency of 9.18%.

中文翻译：

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基于角形4,9-二烷基萘二噻吩的八环梯型非富勒烯受体，用于高效三元混合有机光伏

开发了基于角形的4,9-二十二烷基萘二噻吩基八环阶梯型结构。这种新的梯形供体（LD）与吸电子IC和FIC单元结合，形成了两种A-LD-A型非富勒烯受体材料NCIC和NCFIC。将NCIC和NCFIC作为n型受体与p型供体PBDB-T混合，以形成互补的吸收和合适的能级比对。二进制混合PBDB-T：NCIC和PBDB-T：NCFIC器件的效率分别为7.3％和7.5％。掺入PC ₇₁ BM以形成D ₁：A ₁：A ₂三元共混物，其进一步增强了在较短波长下的吸收。PC ₇₁简介BM不仅有效地提高了吸收率，而且提供了激子离解和电子传输的多个通道，从而大大改善了J _sc。有趣的是，三元混合设备的V _oc与PC ₇₁ BM的添加量成反比。使用PBDB-T：NCIC：PC ₇₁ BM（重量百分比为1：1：1）的设备显示出了8.32％的改善的PCE。此外，使用PBDB-T：NCFIC：PC ₇₁ BM（重量百分比为1：1：1.5）共混物的优化设备达到了9.18％的最高效率。