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Charge Transfer Dyn...
Charge Transfer Dynamics and Device Performance of Environmentally Friendly Processed Nonfullerene Organic Solar Cells
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- Wouk de Menezes, Luana (författare)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten,Univ Fed Parana, Brazil
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- Jin, Yingzhi (författare)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Benatto, Leandro (författare)
- Univ Fed Parana, Brazil
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- Wang, Chuan Fei (författare)
- Linköpings universitet,Biomolekylär och Organisk Elektronik,Tekniska fakulteten
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- Koehler, Marlus (författare)
- Univ Fed Parana, Brazil
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- Zhang, Fengling (författare)
- Linköpings universitet,Elektroniska och fotoniska material,Tekniska fakulteten
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- Roman, Lucimara Stolz (författare)
- Univ Fed Parana, Brazil
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(creator_code:org_t)
- 2018-08-22
- 2018
- Engelska.
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Ingår i: ACS Applied Energy Materials. - : AMER CHEMICAL SOC. - 2574-0962. ; 1:9, s. 4776-4785
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In the last years, one of the pursuits has been to replace the use of halogenated solvent during the processing of organic photovoltaic (OPV) devices. Herein, we investigate the nonhalogenated solvent, o-methylanisole (o-MA) and the well stabilized o-dichlorobenzene (o-DCB) to process the bulk heterojunction (BHJ) based on PTB7-Th donor (D) and 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4-hexylphenyl)-dithieno[2,3-d:2,3 - d]-s-indaceno [1,2-b:5,6-b] dithiophene) (ITIC) acceptor (A). The formation of D A interfaces with different (solvent-dependent) characteristics was verified by steady-state photoluminescence and morphological and electrical measurements. These measurements show a rather comparable device efficiency of the PTB7-th:ITIC BHJ processed by o-MA (compared to the device processed using o-DCB) despite the lower absorption of the films and the lower V-OC. Also, the charge-transfer (CT) state formation was investigated and the reasons behind the V-OC losses were correlated to the interface variations when processed by different solvents. Some experimental results are then discussed in light of the electronic structure of the molecules calculated using the density functional theory (DFT) method. The comparison between the experimental data and the theoretical calculations give some insights about the microscopic processes involved in the variation of the devices properties processed using the o-DCB and o-Ma solvents. We concluded that the D-A distance clearly affects the CT state energy and consequently the V-OC. Furthermore, higher air stability is observed when the active layer is processed using o-MA instead of o-DCB. The better stability was observed in self-lifetime measurements and air-processed devices.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- green solvents; nonfullerene solar cells; voltage losses; charge transfer state; density functional theory; air stability
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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