Enhanced power conversion efficiency of organic solar cells by embedding Ag nanoparticles in exciton blocking layer

Inho Kim, Tyler Fleetham, Hyung Woo Choi, Jea Young Choi, Taek Sung Lee, Doo Seok Jeong, Wook Seong Lee, Kyeong Seok Lee, Yong Kyun Lee, Terry Alford, Jian Li

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We demonstrate the power conversion efficiency of bulk heterojunction organic solar cells can be enhanced by introducing Ag nanoparticles into organic exciton blocking layer. The Ag nanoparticles were incorporated into the exciton blocking layer by thermal evaporation. Compared with the conventional cathode contact materials such as Al, LiF/Al, devices with Ag nanoparticles incorporated in the exciton blocking layer showed lower series resistances and higher fill factors, leading to a 3.2% power conversion efficiency with a 60 nm active layer; whereas, the conventional devices have only 2.0-2.3% power conversion efficiency. Localized surface plasmon resonances by the Ag nanoparticles and their contribution to photocurrent were also discussed by simulating optical absorptions using a FDTD (finite-difference-time-domain) method.

Original languageEnglish (US)
Pages (from-to)2414-2419
Number of pages6
JournalOrganic Electronics: physics, materials, applications
Volume15
Issue number10
DOIs
StatePublished - 2014

Fingerprint

Excitons
embedding
Conversion efficiency
solar cells
excitons
Nanoparticles
nanoparticles
Thermal evaporation
Finite difference time domain method
Surface plasmon resonance
Photocurrents
surface plasmon resonance
finite difference time domain method
Light absorption
photocurrents
Heterojunctions
heterojunctions
electric contacts
optical absorption
Cathodes

Keywords

  • Ag nanoparticle
  • Exciton blocking layer
  • Organic solar cells
  • Surface plasmon resonance

ASJC Scopus subject areas

  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Enhanced power conversion efficiency of organic solar cells by embedding Ag nanoparticles in exciton blocking layer. / Kim, Inho; Fleetham, Tyler; Choi, Hyung Woo; Choi, Jea Young; Lee, Taek Sung; Jeong, Doo Seok; Lee, Wook Seong; Lee, Kyeong Seok; Lee, Yong Kyun; Alford, Terry; Li, Jian.

In: Organic Electronics: physics, materials, applications, Vol. 15, No. 10, 2014, p. 2414-2419.

Research output: Contribution to journalArticle

Kim, Inho ; Fleetham, Tyler ; Choi, Hyung Woo ; Choi, Jea Young ; Lee, Taek Sung ; Jeong, Doo Seok ; Lee, Wook Seong ; Lee, Kyeong Seok ; Lee, Yong Kyun ; Alford, Terry ; Li, Jian. / Enhanced power conversion efficiency of organic solar cells by embedding Ag nanoparticles in exciton blocking layer. In: Organic Electronics: physics, materials, applications. 2014 ; Vol. 15, No. 10. pp. 2414-2419.
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AU - Jeong, Doo Seok

AU - Lee, Wook Seong

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AB - We demonstrate the power conversion efficiency of bulk heterojunction organic solar cells can be enhanced by introducing Ag nanoparticles into organic exciton blocking layer. The Ag nanoparticles were incorporated into the exciton blocking layer by thermal evaporation. Compared with the conventional cathode contact materials such as Al, LiF/Al, devices with Ag nanoparticles incorporated in the exciton blocking layer showed lower series resistances and higher fill factors, leading to a 3.2% power conversion efficiency with a 60 nm active layer; whereas, the conventional devices have only 2.0-2.3% power conversion efficiency. Localized surface plasmon resonances by the Ag nanoparticles and their contribution to photocurrent were also discussed by simulating optical absorptions using a FDTD (finite-difference-time-domain) method.

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