journal article·2020-09-30

Effect of the Energy Offset on the Charge Dynamics in Nonfullerene Organic Solar Cells

Yunhao Cai, Huotian Zhang, Linglong Ye, Rui Zhang, Jinqiu Xu, Kangning Zhang, Pengqing Bi, Tengfei Li, Kangkang Weng, Ke Xu, Jianlong Xia, Qinye Bao, Feng Liu, Xiaotao Hao, Songting Tan, Feng Gao, Xiaowei Zhan, Yanming Sun

ACS Applied Materials & Interfaces· Volume 12· Issue 39
Publisher page

Abstract

The energy offset, considered as the driving force for charge transfer between organic molecules, has significant effects on both charge separation and charge recombination in organic solar cells. Herein, we designed material systems with gradually shifting energy offsets, including both positive and negative values. Time-resolved spectroscopy was used to monitor the charge dynamics within the bulk heterojunction. It is striking to find that there is still charge transfer and charge generation when the energy offset reached -0.10 eV (ultraviolet photoelectron spectroscopy data). This work not only indicates the feasibility of the free carrier generation and the following charge separation under the condition of a negative offset but also elucidates the relationship between the charge transfer and the energy offset in the case of polymer chlorination.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Thin-Film Transistor Technologies

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

Affiliations

School of Chemistry, Beihang University, Beijing 100191, P. R. China

Department of Physics, Chemistry, and Biology, Linköping University, Linköping 58183, Sweden

School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P. R. China

School of Physics State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, P. R. China

Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, P. R. China

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center of Smart Materials and Devices, Wuhan University of Technology, Wuhan 430070, P. R. China

Key Laboratory of Polar Materials and Devices, Department of Optoelectronics, East China Normal University, 200241 Shanghai, P. R. China

Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, P. R. China

Funding

China Postdoctoral Science Foundation · National Natural Science Foundation of China

References (40)

Show source-provided references
1. 10.1038/natrevmats.2018.310.1038/natrevmats.2018.3 ↗
2. 10.1021/jacs.6b0174410.1021/jacs.6b01744 ↗
3. 10.1002/adma.20170596910.1002/adma.201705969 ↗
4. 10.1038/nmat506310.1038/nmat5063 ↗
5. 10.1016/j.joule.2019.01.00410.1016/j.joule.2019.01.004 ↗
6. 10.1002/adma.20190296510.1002/adma.201902965 ↗
7. 10.1021/jacs.9b0993910.1021/jacs.9b09939 ↗
8. 10.1126/science.aat261210.1126/science.aat2612 ↗
9. 10.1039/C9EE03710A10.1039/C9EE03710A ↗
10. 10.1038/ncomms1008510.1038/ncomms10085 ↗
11. 10.1038/nenergy.2016.8910.1038/nenergy.2016.89 ↗
12. 10.1038/s41563-018-0128-z10.1038/s41563-018-0128-z ↗
13. 10.1002/adma.20190632410.1002/adma.201906324 ↗
14. 10.1038/s41467-017-02457-510.1038/s41467-017-02457-5 ↗
15. 10.1002/adfm.20120060810.1002/adfm.201200608 ↗
16. 10.1126/science.121774510.1126/science.1217745 ↗
17. 10.1021/ja409387410.1021/ja4093874 ↗
18. 10.1021/jacs.8b1212610.1021/jacs.8b12126 ↗
19. 10.1038/s41467-020-14549-w10.1038/s41467-020-14549-w ↗
20. 10.1002/adma.20180421510.1002/adma.201804215 ↗
21. 10.1016/j.isci.2019.08.03810.1016/j.isci.2019.08.038 ↗
22. 10.1016/j.nanoen.2019.01.03910.1016/j.nanoen.2019.01.039 ↗
23. 10.1002/macp.20140013110.1002/macp.201400131 ↗
24. 10.1016/j.joule.2018.05.01010.1016/j.joule.2018.05.010 ↗
25. 10.1002/adma.20170735310.1002/adma.201707353 ↗
26. 10.1007/s00339-003-2182-910.1007/s00339-003-2182-9 ↗
27. 10.1016/0304-4173(85)90014-x10.1016/0304-4173(85)90014-x ↗
28. 10.1063/1.174272310.1063/1.1742723 ↗
29. 10.1021/acs.jpcc.7b0921310.1021/acs.jpcc.7b09213 ↗
30. 10.1007/s11426-019-9478-210.1007/s11426-019-9478-2 ↗
31. 10.1038/srep2683210.1038/srep26832 ↗
32. 10.1021/acsenergylett.9b0068110.1021/acsenergylett.9b00681 ↗
33. 10.1103/physrevapplied.7.04401610.1103/physrevapplied.7.044016 ↗
34. 10.1002/aenm.20180135210.1002/aenm.201801352 ↗
35. 10.1063/1.173603410.1063/1.1736034 ↗
36. 10.1002/adfm.20120314810.1002/adfm.201203148 ↗
37. 10.1002/aenm.20190182310.1002/aenm.201901823 ↗
38. 10.1038/nenergy.2017.5310.1038/nenergy.2017.53 ↗
39. 10.1021/acsenergylett.8b0166510.1021/acsenergylett.8b01665 ↗
40. 10.1021/jacs.9b0146510.1021/jacs.9b01465 ↗