陈先凯教授及其合作者在Angew. Chem. Int. Ed.上发表论文

作者：

HaoWang^1,2#, Busheng Zhang^1#, Liming Wang^3,4#, Xia Guo^2#, Le Mei⁵, Bo Cheng², Wei Sun², Lixuan Kan⁶, Xinxin Xia²*, Xiaotao Hao⁷, Thomas Geue⁸, Feng Liu⁶, Maojie Zhang²* and Xian-Kai Chen^1,9*

单位：

¹Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, P.R. China.

²National Engineering Research Center for Colloidal Materials, Key Laboratory of Special Functional Aggregated Materials (Shandong University), Ministry of Education, School of Chemistry & Chemical Engineering, Shandong University, Jinan, Shandong 250100, P.R. China.

³Spallation Neutron Source Science Center, Dongguan 523803, P.R. China.

⁴Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P.R. China.

⁵Department of Chemistry, City University of Hong Kong, Kowloon 999077, Hong Kong.

⁶School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Center of Hydrogen Science, Center of Physical Science, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.

⁷School of Physics, Shandong University, Jinan, Shandong 250100, P.R. China.

⁸PSI Center for Neutron and Muon Sciences, 5232 Villigen, Switzerland.

⁹State Key Laboratory of Bioinspired interfacial Materials Science, Soochow University, Suzhou, Jiangsu 215123, P.R. China

摘要：

Layer-by-layer (LBL) deposition has become a facile and promising method to fabricate highly efficient organic solar cells (OSCs). However, characterization and optimization of 3D morphology remain a grand challenge for LBL-processed active layers, and their correlation with photovoltaic properties of OSC devices is not clear to date. Here, to address this issue, the morphology and its formation mechanisms of LBL-processed active layer based on the classical D18/L8-BO blend were investigated systematically. Intriguingly, a unique 3D nanomorphology is achieved and uncovered within the LBL processed active layer, which highlights a highly uniform and “zigzag”-shaped phase structure formed by the intersection of donor and acceptor aggregates along horizontal direction in the middle-depth layer, rarely found in bulk heterojunction (BHJ) films processed by blend casting. Our results revealed that solid additive DBM with a twisted conformation plays a crucial role in achieving the uniform phase structure of LBL-deposited active layer. Consequently, the characteristic 3D morphology of LBL-processed device significantly improves short-circuit current and fill factor, enabling an impressive PCE of 20.2% in such binary device. Therefore, this work unambiguously demonstrates a unique 3D nanomorphology within LBL active layer, unveils the morphology manipulation mechanism, and their correlation with optoelectronic properties of OSCs.

影响因子：

16.1

分区情况：

一区

链接：

https://doi.org/10.1002/anie.202508257