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Aqueous Metal Oxide Inks for Modifying Electrode Work Function in Polymer Solar Cells
Author(s) -
Tan Mein Jin,
Chen Wei,
Chellappan Vijila
Publication year - 2015
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.201500438
Subject(s) - materials science , pedot:pss , photoactive layer , indium tin oxide , oxide , electrode , work function , polymer solar cell , energy conversion efficiency , chemical engineering , vanadium oxide , aqueous solution , layer (electronics) , nanotechnology , optoelectronics , organic chemistry , chemistry , engineering , metallurgy
A method to prepare aqueous metal oxide inks for tuning the work function (WF) of electrodes is demonstrated. Thin films prepared from the metal oxide ink based on vanadium oxide (V 2 O 5 ) nanoparticles are found to increase the WF of an indium‐tin‐oxide (ITO) electrode. ITO substrates modified with V 2 O 5 films are applied as a hole selective layer (HSL) in polymer solar cells (PSCs) using a poly(3‐hexylthiophene) and [6,6]‐phenyl‐C61 butyric acid methyl ester blend as a photoactive layer. The PSCs prepared with V 2 O 5 ‐modified ITO show better device performance, achieving a power conversion efficiency of 3.6%, demonstrating 15% enhancement compared to conventional ITO/poly(3,4‐ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT‐PSS) based devices. Furthermore, ITO/V 2 O 5 ‐modified devices exhibit better ambient stability with 60% improvement in device lifetime than those using PEDOT:PSS as an HSL. This solution‐processable and highly stable WF‐modifying metal oxide film can be a potential alternative material for engineering interfaces in optoelectronic devices.