Optimization of the zinc oxide electron transport layer in P3HT:PC61BM based organic solar cells by annealing and yttrium doping

Sayantan Das, Terry Alford

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


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.

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

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


Dive into the research topics of 'Optimization of the zinc oxide electron transport layer in P<sub>3</sub>HT:PC<sub>61</sub>BM based organic solar cells by annealing and yttrium doping'. Together they form a unique fingerprint.

Cite this