Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells
All-polymer solar cells (all-PSCs) have attracted enormous attention and achieved significant progress in recent years due to their long-term stability and excellent film stretchability. However, the problem of morphology control in bulk-heterojunction (BHJ) films due to highly entangled polymeric c...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-06-01
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| Series: | APL Energy |
| Online Access: | http://dx.doi.org/10.1063/5.0131128 |
| _version_ | 1797635514399981568 |
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| author | Mengzhen Sha Bili Zhu Qian Wang Ping Deng Xunfan Liao Hang Yin Xiaotao Hao |
| author_facet | Mengzhen Sha Bili Zhu Qian Wang Ping Deng Xunfan Liao Hang Yin Xiaotao Hao |
| author_sort | Mengzhen Sha |
| collection | DOAJ |
| description | All-polymer solar cells (all-PSCs) have attracted enormous attention and achieved significant progress in recent years due to their long-term stability and excellent film stretchability. However, the problem of morphology control in bulk-heterojunction (BHJ) films due to highly entangled polymeric chains hinders the further improvement of device performance. In this work, we obtained fine-tuned photoactive layer morphology through reconstructed microstructure induced by steric effects to realize an improved device performance in ternary all-PSCs. The large tetrahexylphenyl substituents on the backbone of naphthalene diimide–indacenodithienothiophene based copolymer acceptor BL-102 bring forth the steric-hindrance effect and influence intermolecular interactions. Therefore, the copolymer BL-102 delivers the property of suppressed self-aggregation, causing reconstructed crystalline features and morphology in blending films. The ternary devices tended to reduce the excessive phase separation by suppressing the aggregation of original polymers but to promote intermixing behaviors. Therefore, the optimal BHJ film manifested a well-formed bi-continuous interpenetrating nanoscale network with a larger π–π stacking coherence length and ordered face-on molecular orientation. Hence, a faster electron transfer (ET) and hole transfer (HT) process combined with balanced charge carrier mobilities can be achieved to enhance the overall device performance. This work provides an effective method to regulate the photoactive layer morphology of all-PSCs through structurally steric hindrance effects and demonstrate the significance of ternary-blending strategy induced nanoscale morphology modulation for fabricating highly efficient all-PSCs. |
| first_indexed | 2024-03-11T12:22:52Z |
| format | Article |
| id | doaj.art-8bb8627c2d98489a88d82847708077c9 |
| institution | Directory Open Access Journal |
| issn | 2770-9000 |
| language | English |
| last_indexed | 2024-03-11T12:22:52Z |
| publishDate | 2023-06-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Energy |
| spelling | doaj.art-8bb8627c2d98489a88d82847708077c92023-11-06T21:13:22ZengAIP Publishing LLCAPL Energy2770-90002023-06-0111016103016103-910.1063/5.0131128Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cellsMengzhen Sha0Bili Zhu1Qian Wang2Ping Deng3Xunfan Liao4Hang Yin5Xiaotao Hao6School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, People’s Republic of ChinaCollege of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, People’s Republic of ChinaSchool of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, People’s Republic of ChinaCollege of Materials Science and Engineering, Fuzhou University, Fuzhou, Fujian 350108, People’s Republic of ChinaKey Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang, Jiangxi 330022, People’s Republic of ChinaSchool of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, People’s Republic of ChinaSchool of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, Shandong 250100, People’s Republic of ChinaAll-polymer solar cells (all-PSCs) have attracted enormous attention and achieved significant progress in recent years due to their long-term stability and excellent film stretchability. However, the problem of morphology control in bulk-heterojunction (BHJ) films due to highly entangled polymeric chains hinders the further improvement of device performance. In this work, we obtained fine-tuned photoactive layer morphology through reconstructed microstructure induced by steric effects to realize an improved device performance in ternary all-PSCs. The large tetrahexylphenyl substituents on the backbone of naphthalene diimide–indacenodithienothiophene based copolymer acceptor BL-102 bring forth the steric-hindrance effect and influence intermolecular interactions. Therefore, the copolymer BL-102 delivers the property of suppressed self-aggregation, causing reconstructed crystalline features and morphology in blending films. The ternary devices tended to reduce the excessive phase separation by suppressing the aggregation of original polymers but to promote intermixing behaviors. Therefore, the optimal BHJ film manifested a well-formed bi-continuous interpenetrating nanoscale network with a larger π–π stacking coherence length and ordered face-on molecular orientation. Hence, a faster electron transfer (ET) and hole transfer (HT) process combined with balanced charge carrier mobilities can be achieved to enhance the overall device performance. This work provides an effective method to regulate the photoactive layer morphology of all-PSCs through structurally steric hindrance effects and demonstrate the significance of ternary-blending strategy induced nanoscale morphology modulation for fabricating highly efficient all-PSCs.http://dx.doi.org/10.1063/5.0131128 |
| spellingShingle | Mengzhen Sha Bili Zhu Qian Wang Ping Deng Xunfan Liao Hang Yin Xiaotao Hao Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells APL Energy |
| title | Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells |
| title_full | Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells |
| title_fullStr | Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells |
| title_full_unstemmed | Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells |
| title_short | Crystallinity and phase separation induced morphological modulation for efficient ternary all-polymer solar cells |
| title_sort | crystallinity and phase separation induced morphological modulation for efficient ternary all polymer solar cells |
| url | http://dx.doi.org/10.1063/5.0131128 |
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