Advanced

Effect of post-thermal annealing on the performance and charge photogeneration dynamics of PffBT4T-2OD/PC71BM solar cells

Zhang, Wei LU ; Hu, Rong ; Zeng, Xiaokang ; Su, Xiaojun LU ; Chen, Zhifeng ; Zou, Xianshao LU ; Peng, Jun ; Zhang, Chengyun and Yartsev, Arkady LU (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)


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.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
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
2020-04-07 05:20:57
@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},
  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},
}