16.52% Efficiency All‐Polymer Solar Cells with High Tolerance of the Photoactive Layer Thickness
Abstract
All‐polymer solar cells (all‐PSCs) have drawn growing attention and achieved tremendous progress recently, but their power conversion efficiency (PCE) still lags behind small‐molecule‐acceptor (SMA)‐based PSCs due to the relative difficulty on morphology control of polymer photoactive blends. Here, low‐cost PTQ10 is introduced as a second polymer donor (a third component) into the PM6:PY‐IT blend to finely tune the energy‐level matching and microscopic morphology of the polymer blend photoactive layer. The addition of PTQ10 decreases the π–π stacking distance, and increases the π–π stacking coherence length and the ordered face‐on molecular packing orientation, which improves the charge separation and transport in the photoactive layer. Moreover, the deeper highest occupied molecular orbital energy level of the PTQ10 polymer donor than PM6 leads to higher open‐circuit voltage of the ternary all‐PSCs. As a result, a PCE of 16.52% is achieved for ternary all‐PSCs, which is one of the highest PCEs for all‐PSCs. In addition, the ternary devices exhibit a high tolerance of the photoactive layer thickness with high PCEs of 15.27% and 13.91% at photoactive layer thickness of ≈205 and ≈306 nm, respectively, which are the highest PCEs so far for all‐PSCs with a thick photoactive layer.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 17, 2022
- Source ID
- 10.1002/adma.202108749
Entities
People
- Chenkai Sun
- Guang Yang
- Harald Ade
- Hongmei Zhuo
- Indunil Angunawela
- Lei Meng
- Liuyang Zhou
- Shaman Li
- Shucheng Qin
- Wenqing Zhang
- Yongfang Li
- Zhi‐guo Zhang
Organizations
- Beijing University of Chemical Technology
- Institute of Chemistry
- National Natural Science Foundation of China
- North Carolina State University
- Office of Basic Energy Sciences
- Office of Naval Research
- Office of Science
- Soochow University
- United States Department of Energy
- University of Chinese Academy of Sciences
- Zhengzhou University