Versatile Pendant Polymer for Selective Charge Carrier Transport via Controlling the Supramolecular Self‐Assembly

Polyvinyl carbazole (P0)‐based pendant polymers were synthesized by modifying carbazole motifs with pyrene derivatives (P1 and P4) to manipulate the bandgap and frontier orbital energy levels. To establish the electronic properties of pendant polymers according to structural differences, the polymer...

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Bibliographic Details
Published in:ChemSusChem 2021-12, Vol.14 (23), p.5167-5178
Main Authors: Lim, Jihyun, Kim, Min‐Sung, Jang, Woongsik, Park, Jin Kuen, Wang, Dong Hwan
Format: Article
Language:English
Subjects:
Addition polymerization
Assembly
Benzene
Carbazoles
Carrier transport
Circuits
Current carriers
Dark current
Electronic devices
Energy levels
interface engineering
perovskite photodetector
perovskite solar cells
Perovskites
Photovoltaic cells
Polymers
Polyvinyl carbazole
self-assembly
Solar cells
supramolecular chemistry
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Summary:Polyvinyl carbazole (P0)‐based pendant polymers were synthesized by modifying carbazole motifs with pyrene derivatives (P1 and P4) to manipulate the bandgap and frontier orbital energy levels. To establish the electronic properties of pendant polymers according to structural differences, the polymers were utilized as additional hole transport layers in planar‐type perovskite solar cells and organic photovoltaic cells. When P4 with thiophene‐pyrene pendant was used as hole transport layer, all device parameters, except open‐circuit voltage, were significantly improved in comparison with P0 and P1 (conjugated with t‐butyl pyrene derivatives). Since P4 had more electrically conductive thiophene units than benzene units with fewer alkyl groups, the supramolecular assembly of P4 was found to be more favorable in electronic devices. Furthermore, devices with P4 demonstrated lower dark current than others, which could potentially be useful for charge carrier transport and sensitive photo detecting devices. Supramolecular hole transport: Through the synthesis of a new polyvinyl carbazole‐based pendant polymer (P4), the bandgap and frontier orbital energy levels are manipulated and introduced into the interlayer. The thiophene pyrene group of the P4 interlayer modifies the property of the interface to form a stable charge carrier of the perovskite device, increases the fill factor, reduces defects, suppresses the dark current, and enhances detectivity in reverse bias.
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.202101785