DataVXAdvanced MaterialsPaper
journal article·2022-05Open access

16.52% Efficiency All‐Polymer Solar Cells with High Tolerance of the Photoactive Layer Thickness

Wenqing Zhang, Chenkai Sun, Indunil Angunawela, Lei Meng, Shucheng Qin, Liuyang Zhou, Shaman Li, Hongmei Zhuo, Guang Yang, Zhi‐Guo Zhang, Harald Ade, Yongfang Li

Advanced Materials· Volume 34· Issue 20
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Source abstract

Abstract

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.
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Research context

Polymers

OpenAlex topics: Organic Electronics and Photovoltaics · Perovskite Materials and Applications · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Chemistry and Green Catalysis Center Zhengzhou University Zhengzhou 450001 China

Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL) North Carolina State University Raleigh NC 27695 USA

Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China

School of Chemical Science University of Chinese Academy of Sciences Beijing 100049 China

State Key Laboratory of Organic/Inorganic Composites Beijing University of Chemical Technology Beijing 100029 China

Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor‐Optoelectronics Materials and Devices College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China

Funding

National Natural Science Foundation of China · National Key Research and Development Program of China · North Carolina State University · Office of Naval Research · Office of Science · Basic Energy Sciences · U.S. Department of Energy

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