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Understanding of ph...
Understanding of photophysical processes in dio additive-treated ptb7:Pc71 bm solar cells
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- Su, Xiaojun (författare)
- Guangzhou University
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- Hu, Rong (författare)
- Chongqing University of Arts and Sciences
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- Wen, Guanzhao (författare)
- Guangzhou University
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- Zou, Xianshao (författare)
- Lund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH
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- Qing, Mengyao (författare)
- Guangzhou University
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- Peng, Jun (författare)
- Guangzhou University
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- He, Xiaochuan (författare)
- Songshan Lake Materials Laboratory
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- Zhang, Wei (författare)
- Guangzhou University
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(creator_code:org_t)
- 2021-09-18
- 2021
- Engelska.
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Ingår i: Crystals. - : MDPI AG. - 2073-4352. ; 11:9
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://www.mdpi.com...
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https://lup.lub.lu.s...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- 1,8-diiodooctane (DIO) additive is an important method for optimizing the morphology and device performance of polythieno[3,4-b]-thiophene-co-benzodithiophene (PTB7)-based polymer solar cells. However, the effect of DIO additive on charge photogeneration dynamics of PTB7-based polymer solar cells is still poorly understood. In this work, the effect of DIO additive on the carrier photogeneration dynamics, as well as device performance of PTB7: [6,6]-phenyl-C71-butyric acid methyl ester (PC71 BM) solar cells was studied. Bias-dependent photoluminescence (PL) experiments of a neat PTB7 device show that the exciton cannot be dissociated by the electric field in the device within the operating voltage range, but it can be effectively dissociated by the high electric field. PL and time-resolved PL studies show that DIO additive reduces the phase size of PTB7 in the blend film, resulting in an increased exciton dissociation efficiency. The carrier recombination processes were studied by transient absorption, which shows geminate carrier recombination was suppressed in the DIO-treated PTB7:PC71 BM device in ultrafast time scale. The increased exciton dissociation efficiency and suppressed carrier recombination in ultrafast time scale play an important role for DIO-treated PTB7:PC71 BM solar cells to attain a higher power conversion efficiency.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- Carrier photogeneration
- DIO additive
- polymer solar cells
- PTB7:PC BM
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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