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https://hdl.handle.net/20.500.14279/18183
Τίτλος: | Effects of layer thickness and annealing of PEDOT:PSS layers in organic photodetectors | Συγγραφείς: | Friedel, Bettina Keivanidis, Panagiotis E. Brenner, Thomas J.K. Abrusci, Agnese McNeill, Christopher R. Friend, Richard H. Greenham, Neil C. |
Major Field of Science: | Engineering and Technology | Field Category: | Mechanical Engineering | Λέξεις-κλειδιά: | Thickness;External quantum efficiency;Layers;Conjugated polymersAnnealing (metallurgy) | Ημερομηνία Έκδοσης: | 8-Σεπ-2009 | Πηγή: | Macromolecules, 2009, vol. 42, no. 17, pp. 6741-6747 | Volume: | 42 | Issue: | 17 | Start page: | 6741 | End page: | 6747 | Περιοδικό: | Macromolecules | Περίληψη: | We have investigated the effects of thickness variation and thermal treatment of the electrode polymer poly(3,4-ethylenedioxythiophene): poly(styrenesulfonic acid) (PEDOT:PSS) in photovoltaic and photodetector devices using conjugated polymer blends as the photoactive material. By variation of the PEDOT:PSS layer thickness between 25 and 150 nm, we found optimum device performance, in particular low dark current and high external quantum efficiency (EQE) and open-circuit voltage (Voc), at around 70 nm. This has been observed for two different active layers. Annealing studies on the PEDOT:PSS films, with temperatures varied between 120 and 400°C, showed an optimum device performance, in particular EQE and Voc at 250°C. This optimum performance was found to be associated with loss of water from the PSS shell of the PEDOT:PSS grains. For annealing temperatures above 260°C, device performance was dramatically reduced. This was associated with chemical decomposition leading to loss of sulfonic acid, although this did not significantly affect the in-plane conductivity. © 2009 American Chemical Society. | URI: | https://hdl.handle.net/20.500.14279/18183 | ISSN: | 15205835 | DOI: | 10.1021/ma901182u | Rights: | © American Chemical Society | Type: | Article | Affiliation: | University of Cambridge | Publication Type: | Peer Reviewed |
Εμφανίζεται στις συλλογές: | Άρθρα/Articles |
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