Efficient Modification of Metal Oxide Surfaces with Phosphonic Acids by Spray Coating

• DOI: 10.1021/la303354t
• Publication Date: 2013-02-19T18:40:39Z
• Authors: Anuradha Bulusu; Sergio A. Paniagua; Bradley A. MacLeod; Ajaya K. Sigdel; Joseph J. Berry; Dana C. Olson; Seth R. Marder; Samuel Graham
• Keywords: Indium tin oxide; Open-circuit voltage; Dip-coating

We report a rapid method of depositing phosphonic acid molecular groups onto conductive metal oxide surfaces. Solutions pentafluorobenzyl (PFBPA) were deposited on indium tin oxide, zinc nickel and by spray coating substrates heated to temperatures between 25 150 °C using 60 s exposure time. Comparisons coverage changes in work function made the more conventional dip-coating utilizing 1 h The data show that shifts surface similar or greater than those obtained method. When deposition temperature was increased, magnitude shift also found increase. result less etching zinc-containing oxides Bulk heterojunction solar cells polyhexylthiophene (P3HT) bis-indene-C60 (ICBA) tested with PFBPA dip spray-modified ITO as well poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS)-modified ITO. showed open circuit voltage (VOC) fill factor (FF) 5% lower short current density (JSC) power conversion efficiency (PCE) dip- PEDOT:PSS-modified These results demonstrate potential path scalable deposit modifiers while overcoming limitations other techniques require long post-processing times.