Ground- And excited-state characteristics in photovoltaic polymer N2200
(2021) In RSC Advances 11(33). p.20191-20199- Abstract
As a classical polymer acceptor material, N2200 has received extensive attention and research in the field of polymer solar cells (PSCs). However, the intrinsic properties of ground- and excited-states in N2200, which are critical for the application of N2200 in PSCs, remain poorly understood. In this work, the ground- and excited-state properties of N2200 solution and film were studied by steady-state and time-resolved spectroscopies as well as time-dependent density functional theory (TD-DFT) calculations. The transition mechanism of absorption peaks of N2200 was evaluated through the natural transition orbitals (NTOs) and hole-electron population analysis by TD-DFT. Time-resolved photoluminescence (TRPL) study shows that the... (More)
As a classical polymer acceptor material, N2200 has received extensive attention and research in the field of polymer solar cells (PSCs). However, the intrinsic properties of ground- and excited-states in N2200, which are critical for the application of N2200 in PSCs, remain poorly understood. In this work, the ground- and excited-state properties of N2200 solution and film were studied by steady-state and time-resolved spectroscopies as well as time-dependent density functional theory (TD-DFT) calculations. The transition mechanism of absorption peaks of N2200 was evaluated through the natural transition orbitals (NTOs) and hole-electron population analysis by TD-DFT. Time-resolved photoluminescence (TRPL) study shows that the lifetimes of singlet excitons in N2200 chlorobenzene solution and film are ∼90 ps and ∼60 ps, respectively. Considering the absolute quantum yield of N2200 film, we deduce that the intrinsic lifetime of singlet exciton can be as long as ∼20 ns. By comparing the TRPL and transient absorption (TA) kinetics, we find that the decay of singlet excitons in N2200 solution is dominated by a fast non-radiative decay process, and the component induced by intersystem crossing is less than 5%. Besides that, the annihilation radius, annihilation rate and diffusion length of singlet excitons in N2200 film were evaluated as 3.6 nm, 2.5 × 10−9cm3s−1and 4.5 nm, respectively. Our work provides comprehensive information on the excited states of N2200, which is helpful for the application of N2200 in all-PSCs.
(Less)
- author
- Wen, Guanzhao ; Zou, Xianshao LU ; Hu, Rong ; Peng, Jun ; Chen, Zhifeng ; He, Xiaochuan ; Dong, Geng LU and Zhang, Wei LU
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- in
- RSC Advances
- volume
- 11
- issue
- 33
- pages
- 9 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:85108252966
- pmid:35479889
- ISSN
- 2046-2069
- DOI
- 10.1039/d1ra01474a
- language
- English
- LU publication?
- yes
- id
- 79967236-f300-461c-ae05-e4fc9b7b8d49
- date added to LUP
- 2021-07-15 14:22:57
- date last changed
- 2024-06-29 14:37:30
@article{79967236-f300-461c-ae05-e4fc9b7b8d49,
abstract = {{<p>As a classical polymer acceptor material, N2200 has received extensive attention and research in the field of polymer solar cells (PSCs). However, the intrinsic properties of ground- and excited-states in N2200, which are critical for the application of N2200 in PSCs, remain poorly understood. In this work, the ground- and excited-state properties of N2200 solution and film were studied by steady-state and time-resolved spectroscopies as well as time-dependent density functional theory (TD-DFT) calculations. The transition mechanism of absorption peaks of N2200 was evaluated through the natural transition orbitals (NTOs) and hole-electron population analysis by TD-DFT. Time-resolved photoluminescence (TRPL) study shows that the lifetimes of singlet excitons in N2200 chlorobenzene solution and film are ∼90 ps and ∼60 ps, respectively. Considering the absolute quantum yield of N2200 film, we deduce that the intrinsic lifetime of singlet exciton can be as long as ∼20 ns. By comparing the TRPL and transient absorption (TA) kinetics, we find that the decay of singlet excitons in N2200 solution is dominated by a fast non-radiative decay process, and the component induced by intersystem crossing is less than 5%. Besides that, the annihilation radius, annihilation rate and diffusion length of singlet excitons in N2200 film were evaluated as 3.6 nm, 2.5 × 10<sup>−9</sup>cm<sup>3</sup>s<sup>−1</sup>and 4.5 nm, respectively. Our work provides comprehensive information on the excited states of N2200, which is helpful for the application of N2200 in all-PSCs.</p>}},
author = {{Wen, Guanzhao and Zou, Xianshao and Hu, Rong and Peng, Jun and Chen, Zhifeng and He, Xiaochuan and Dong, Geng and Zhang, Wei}},
issn = {{2046-2069}},
language = {{eng}},
number = {{33}},
pages = {{20191--20199}},
publisher = {{Royal Society of Chemistry}},
series = {{RSC Advances}},
title = {{Ground- And excited-state characteristics in photovoltaic polymer N2200}},
url = {{http://dx.doi.org/10.1039/d1ra01474a}},
doi = {{10.1039/d1ra01474a}},
volume = {{11}},
year = {{2021}},
}