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- Title
Synthesis and Application of Functionalized Diblock Amphiphilic Fullerene Derivatives.
- Authors
Liu, Jikang; Li, Junli; Liu, Xiangfu; Zhang, Zheling; Zhang, Jian; Tu, Guoli
- Abstract
A series of functionalized amphiphilic diblock fullerene derivatives C60‐4TPB, C60‐2DPE, C60‐4HTPB, C60‐PHFBS, and C60‐2BEFPE are developed and applied as the modification layers on zinc oxide (ZnO) in inverted organic solar cell (OSC) devices. By spin‐coating ZnO, the fullerene derivatives layer can reduce the work function of ZnO via modulation of the interfacial dipoles. When introducing solvent treatment by toluene during the preparation of films, the order of the fullerene derivatives layer are clearly increased, which are supported by X‐ray diffraction and contact angle of water measurements. The OSCs devices modified with those fullerene derivatives show power conversion efficiency of 8.62%, 9.21%, 8.86%, 9.14%, and 9.15% based on poly‐[4,8‐bis(5‐(2‐ethylhexyl)‐thiophen‐2‐yl)benzo[1,2‐b:4,5‐b′]‐dithiophene‐alt‐3‐fluoro thieno‐[3,4‐b] thiophene‐2‐carboxylate] (PTB7‐Th) and [6,6]‐phenyl‐C71‐butyric acid methyl ester (PC71BM) blend, respectively. All the results indicate that the development of diblock amphiphilic fullerene derivatives opens a new opportunity to modify the present defects of ZnO by simultaneously modulating interfacial work functions, the wetting properties of the interlayer, and the active layer. Five amphiphilic diblock fullerene derivatives named C60‐4TPB, C60‐4HTPB, C60‐2DPE, C60‐PHFBS, and C60‐2BEFPE are developed, which contain hydrophilic segments with functional groups of ammonium salts, sulfonate, amines, and ether chains. When introduced as a modifying layer onto ZnO, those fullerene derivatives exhibit obvious self‐assembly on the ZnO surface, with treatment of toluene, and modify the ZnO surface defects.
- Subjects
DIBLOCK copolymers; AMPHIPHILES; FULLERENE derivatives; ORGANIC synthesis; ZINC oxide
- Publication
Macromolecular Chemistry & Physics, 2019, Vol 220, Issue 5, pN.PAG
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201800477