Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/122338
Title: MATERIALS DEVELOPMENT AND INTERFACE STUDIES OF INVERTED ORGANIC SOLAR CELLS.
Authors: LIM FANG JENG
Keywords: Inverted organic solar cells, charge transport layer, PEDOT:PSS, titanium oxide, light soaking, degradation study
Issue Date: 30-Jul-2015
Citation: LIM FANG JENG (2015-07-30). MATERIALS DEVELOPMENT AND INTERFACE STUDIES OF INVERTED ORGANIC SOLAR CELLS.. ScholarBank@NUS Repository.
Abstract: This thesis presents a detailed study on organic solar cells with an inverted architecture. Inverted organic solar cells (IOSC) were utilized because it can significantly improve the device lifetime while maintaining a comparable device performance. In this thesis, three major aspects of inverted organic solar cell devices were studied: (1) Processability; (2) Practicality and; (3) Stability. Firstly, the long-standing processability issue of inferior wettability of PEDOT:PSS on glass/ITO substrate was resolved by modifying the hole transport layer with a novel fluorosurfactant. Secondly, the light-soaking issue, which severely hinders the device practicality, was overcome by using chemical bath deposited fluorinated titanium dioxide (F-TiOx) electron transport layer as a key alternative to conventional sol-gel TiOx. Finally, with the incorporation of various donor-acceptor materials other than the commonly used poly-3-hexylthiophene (P3HT), a systematic degradation study and the light-soaking characteristics of low-bandgap benzodithiophene-thienothiophene based co-polymer and diketopyrrolopyrrole based small molecules were conducted on the modified IOSC devices. Ultimately, a solution-processed, light-soaking free, stable and high efficiency inverted organic solar cell was successfully achieved.
URI: http://scholarbank.nus.edu.sg/handle/10635/122338
Appears in Collections:Ph.D Theses (Open)

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