Abstract

Zinc-oxide and yttrium-doped ZnO films were fabricated by a sol-gel processing technique and were incorporated as an electron transport layer in inverted organic solar cells (with an active layer comprising a blend of P<inf>3</inf>HT and PC<inf>61</inf>BM). First, the annealing conditions for the pure sol-gel ZnO layers were optimized. An interesting observation was that the annealing temperature of the ZnO layer significantly influenced the overall organic solar cells performance. Annealing the ZnO film at temperatures of ∼150 °C provided the highest device performance. The physical and surface properties of these ZnO films were examined by X-ray diffraction, atomic force microscopy and UV-vis transmittance measurements. Utilizing the optimized annealing conditions, we further fabricated high-efficiency organic solar cells by doping yttrium in the zinc-oxide (YZO) electron transport layers. The efficiency of YZO based devices was improved by 30% when compared to that of the undoped zinc oxide based devices.

Original languageEnglish (US)
Pages (from-to)45586-45591
Number of pages6
JournalRSC Advances
Volume5
Issue number57
DOIs
StatePublished - 2015

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Zinc Oxide
Yttrium
Zinc oxide
Doping (additives)
Annealing
Sol-gels
Surface properties
Atomic force microscopy
Physical properties
X ray diffraction
Temperature
Organic solar cells
Electron Transport
Processing

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

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title = "Optimization of the zinc oxide electron transport layer in P3HT: PC61BM based organic solar cells by annealing and yttrium doping",
abstract = "Zinc-oxide and yttrium-doped ZnO films were fabricated by a sol-gel processing technique and were incorporated as an electron transport layer in inverted organic solar cells (with an active layer comprising a blend of P3HT and PC61BM). First, the annealing conditions for the pure sol-gel ZnO layers were optimized. An interesting observation was that the annealing temperature of the ZnO layer significantly influenced the overall organic solar cells performance. Annealing the ZnO film at temperatures of ∼150 °C provided the highest device performance. The physical and surface properties of these ZnO films were examined by X-ray diffraction, atomic force microscopy and UV-vis transmittance measurements. Utilizing the optimized annealing conditions, we further fabricated high-efficiency organic solar cells by doping yttrium in the zinc-oxide (YZO) electron transport layers. The efficiency of YZO based devices was improved by 30{\%} when compared to that of the undoped zinc oxide based devices.",
author = "Sayantan Das and Terry Alford",
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T1 - Optimization of the zinc oxide electron transport layer in P3HT

T2 - PC61BM based organic solar cells by annealing and yttrium doping

AU - Das, Sayantan

AU - Alford, Terry

PY - 2015

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N2 - Zinc-oxide and yttrium-doped ZnO films were fabricated by a sol-gel processing technique and were incorporated as an electron transport layer in inverted organic solar cells (with an active layer comprising a blend of P3HT and PC61BM). First, the annealing conditions for the pure sol-gel ZnO layers were optimized. An interesting observation was that the annealing temperature of the ZnO layer significantly influenced the overall organic solar cells performance. Annealing the ZnO film at temperatures of ∼150 °C provided the highest device performance. The physical and surface properties of these ZnO films were examined by X-ray diffraction, atomic force microscopy and UV-vis transmittance measurements. Utilizing the optimized annealing conditions, we further fabricated high-efficiency organic solar cells by doping yttrium in the zinc-oxide (YZO) electron transport layers. The efficiency of YZO based devices was improved by 30% when compared to that of the undoped zinc oxide based devices.

AB - Zinc-oxide and yttrium-doped ZnO films were fabricated by a sol-gel processing technique and were incorporated as an electron transport layer in inverted organic solar cells (with an active layer comprising a blend of P3HT and PC61BM). First, the annealing conditions for the pure sol-gel ZnO layers were optimized. An interesting observation was that the annealing temperature of the ZnO layer significantly influenced the overall organic solar cells performance. Annealing the ZnO film at temperatures of ∼150 °C provided the highest device performance. The physical and surface properties of these ZnO films were examined by X-ray diffraction, atomic force microscopy and UV-vis transmittance measurements. Utilizing the optimized annealing conditions, we further fabricated high-efficiency organic solar cells by doping yttrium in the zinc-oxide (YZO) electron transport layers. The efficiency of YZO based devices was improved by 30% when compared to that of the undoped zinc oxide based devices.

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