Effect of post-thermal annealing on the performance and charge photogeneration dynamics of PffBT4T-2OD/PC71BM solar cells
(2019) In Polymers 11(3).- Abstract
In this work, we studied influence of post thermal annealing on the performance and charge photogeneration processes of PffBT4T-2OD/PC
71
BM solar cells. As-prepared device exhibits a high-power conversion efficiency of 9.5%, much higher than that after thermal annealing. To understand this phenomenon, we studied charge photogeneration processes in these solar cells by means of time resolved spectroscopy. We associate the degradation of solar cell performance with the reduction of exciton dissociation efficiency and with increased bimolecular... (More)
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In this work, we studied influence of post thermal annealing on the performance and charge photogeneration processes of PffBT4T-2OD/PC
71
BM solar cells. As-prepared device exhibits a high-power conversion efficiency of 9.5%, much higher than that after thermal annealing. To understand this phenomenon, we studied charge photogeneration processes in these solar cells by means of time resolved spectroscopy. We associate the degradation of solar cell performance with the reduction of exciton dissociation efficiency and with increased bimolecular recombination of photogenerated charges as a result of annealing. We correlate the generation of localized PffBT4T-2OD polarons observed via spectro-electrochemical measurements with enhancement of the bimolecular charge recombination of annealed solar cells.
- author
- Zhang, Wei LU ; Hu, Rong ; Zeng, Xiaokang ; Su, Xiaojun LU ; Chen, Zhifeng ; Zou, Xianshao LU ; Peng, Jun ; Zhang, Chengyun and Yartsev, Arkady LU
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Charge generation, Polymer solar cell, Power conversion efficiency, Thermal annealing
- in
- Polymers
- volume
- 11
- issue
- 3
- article number
- 408
- publisher
- MDPI AG
- external identifiers
-
- pmid:30960392
- scopus:85063397500
- ISSN
- 2073-4360
- DOI
- 10.3390/polym11030408
- language
- English
- LU publication?
- yes
- id
- 8819977f-36be-4637-824b-d24abc9af910
- date added to LUP
- 2019-04-08 11:14:06
- date last changed
- 2024-09-17 17:19:12
@article{8819977f-36be-4637-824b-d24abc9af910, abstract = {{<p><br> In this work, we studied influence of post thermal annealing on the performance and charge photogeneration processes of PffBT4T-2OD/PC <br> <sub>71</sub><br> BM solar cells. As-prepared device exhibits a high-power conversion efficiency of 9.5%, much higher than that after thermal annealing. To understand this phenomenon, we studied charge photogeneration processes in these solar cells by means of time resolved spectroscopy. We associate the degradation of solar cell performance with the reduction of exciton dissociation efficiency and with increased bimolecular recombination of photogenerated charges as a result of annealing. We correlate the generation of localized PffBT4T-2OD polarons observed via spectro-electrochemical measurements with enhancement of the bimolecular charge recombination of annealed solar cells. <br> </p>}}, author = {{Zhang, Wei and Hu, Rong and Zeng, Xiaokang and Su, Xiaojun and Chen, Zhifeng and Zou, Xianshao and Peng, Jun and Zhang, Chengyun and Yartsev, Arkady}}, issn = {{2073-4360}}, keywords = {{Charge generation; Polymer solar cell; Power conversion efficiency; Thermal annealing}}, language = {{eng}}, number = {{3}}, publisher = {{MDPI AG}}, series = {{Polymers}}, title = {{Effect of post-thermal annealing on the performance and charge photogeneration dynamics of PffBT4T-2OD/PC71BM solar cells}}, url = {{http://dx.doi.org/10.3390/polym11030408}}, doi = {{10.3390/polym11030408}}, volume = {{11}}, year = {{2019}}, }