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In situ-prepared composite materials of PEDOT: PSS buffer layer-metal nanoparticles and their application to organic solar cells
- In situ-prepared composite materials of PEDOT: PSS buffer layer-metal nanoparticles and their application to organic solar cells
- Woo, S[Woo, Sungho]; Jeong, JH[Jeong, Jae Hoon]; Lyu, HK[Lyu, Hong Kun]; Han, YS[Han, Yoon Soo]; Kim, Y[Kim, Youngkyoo]
- DGIST Authors
- Woo, S[Woo, Sungho]; Jeong, JH[Jeong, Jae Hoon]; Lyu, HK[Lyu, Hong Kun]
- Issue Date
- Nanoscale Research Letters, 7
- Article Type
- Buffer Layers; Characteristic Absorption; Charge Collection; Chloroauric Acid; Conducting Polymers; Conversion Efficiency; Enhanced Light Absorption; Fill-Factor; Gold; Gold Coatings; Hole Transporting; In Situ Preparation; Indium Tin Oxide; Methyl Esters; Organic Solar Cell; Organic Solar Cells; PEDOT:PSS; PEDOT:PSS-Metal NPs; Poly(3,4-Ethylenedioxythiophene) (PEDOT); Power Conversion Efficiencies; Silver; Silver Nitrates; Situ Preparation; Sodium; Sodium Borohydrides; Solar Cells; Surface Plasmons; Surface Roughness; Tin; Tin Oxides; Well-Dispersed
- We report an enhancement in the efficiency of organic solar cells via the incorporation of gold (Au) or silver (Ag) nanoparticles (NPs) in the hole-transporting buffer layer of poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), which was formed on an indium tin oxide (ITO) surface by the spin-coating of PEDOT:PSS-Au or Ag NPs composite solution. The composite solution was synthesized by a simple in situ preparation method which involved the reduction of chloroauric acid (HAuCl4) or silver nitrate (AgNO3) with sodium borohydride (NaBH4) solution in the presence of aqueous PEDOT:PSS media. The NPs were well dispersed in the PEDOT:PSS media and showed a characteristic absorption peak due to the surface plasmon resonance effect. Organic solar cells with the structure of ITO/PEDOT:PSS-Au, Ag NPs/poly(3-hexylthiophene):[6,6]-phenyl-C61-butyric acid methyl ester (P3HT:PC61BM)/LiF/Al exhibited an 8% improvement in their power conversion efficiency mainly due to the enlarged surface roughness of the PEDOT:PSS, which lead to an improvement in the charge collection and ultimately improvements in the short-circuit current density and fill factor. © 2012 Woo et al.
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