Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/119778
Title: OPERATIONAL STABILITY OF INVERTED ORGANIC SOLAR CELLS
Authors: KAM ZHI MING
Keywords: photovoltaics, stability, impedance spectroscopy, zinc oxide
Issue Date: 23-Jan-2015
Citation: KAM ZHI MING (2015-01-23). OPERATIONAL STABILITY OF INVERTED ORGANIC SOLAR CELLS. ScholarBank@NUS Repository.
Abstract: The power conversion efficiencies of organic solar cells (OSCs) have been continuously rising within the past decade. This increase slowly places OSCs closer towards commercialization. However, the marketability of these devices is still limited by their reliability under operation. A ubiquitous method to counter some inherent atmospheric instability in OSCs is to employ the use of an ¿inverted¿ geometry in these OSCs. This thesis examines the operational stability of ¿inverted¿ OSCs based on a ZnO electron transport layer (ETL) via comparison with efficient analogous ¿inverted¿ devices derived from the deposition of ultrathin Al layers on either ITO or ZnO. ¿Inverted¿ OSCs using a simple ZnO ETL were shown to quickly suffer losses in open-circuit voltage during operation, which is further elucidated by non-destructive means to be due to increased charge recombination. The analogues were found to be more efficient and longer-lived.
URI: http://scholarbank.nus.edu.sg/handle/10635/119778
Appears in Collections:Ph.D Theses (Open)

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