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Kim, Jin Young
Next Generation Energy Laboratory
Research Interests
  • Polymer solar cells, QD solar cells, organic-inorganic hybrid solar cells, perovskite solar cells, OLEDs, PeLEDs, organic FETs

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Inverted Polymer Solar Cells with Annealing-Free Solution-Processable NiO

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Title
Inverted Polymer Solar Cells with Annealing-Free Solution-Processable NiO
Author
Tran, Hong NhanDao, Duc QuangYoon, Yung JinShin, Yun SeopChoi, Jin SanKim, Jin YoungCho, Shinuk
Issue Date
2021-06
Publisher
WILEY-V C H VERLAG GMBH
Citation
SMALL, pp.2101729
Abstract
Nickel oxide (NiO) offers intrinsic p-type behavior and high thermal and chemical stability, making it promising as a hole transport layer (HTL) material in inverted organic solar cells. However, its use in this application has been rare because of a wettability problem caused by use of water as base solvent and high-temperature annealing requirements. In the present work, an annealing-free solution-processable method for NiO deposition is developed and applied in both conventional and inverted non-fullerene polymer solar cells. To overcome the wettability problem, the typical DI water solvent is replaced with a mixed solvent of DI water and isopropyl alcohol with a small amount of 2-butanol additive. This allows a NiO nanoparticle suspension (s-NiO) to be deposited on a hydrophobic active layer surface. An inverted non-fullerene solar cell based on a blend of p-type polymer PTB7-Th and non-fullerene acceptor IEICO-4F exhibits the high efficiency of 11.23% with an s-NiO HTL, comparable to the efficiency of an inverted solar cell with a MoOx HTL deposited by thermal evaporation. Conventionally structured devices including this s-NiO layer show efficiency comparable to that of a conventional device with a PEDOT:PSS HTL.
URI
https://scholarworks.unist.ac.kr/handle/201301/53263
URL
https://onlinelibrary.wiley.com/doi/10.1002/smll.202101729
DOI
10.1002/smll.202101729
ISSN
1613-6810
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