Lead Sulfide Nanocrystal Quantum Dot Solar Cells with Trenched ZnO Fabricated via Nanoimprinting

Sarah Kim, Jun Kwan Kim, Jianbo Gao, Jung Hoon Song, Hey Jin An, Tae Soo You, Tae Soo Lee, Jong Ryul Jeong, Eung Sug Lee, Jun Ho Jeong, Matthew C. Beard, Sohee Jeong

Research output: Contribution to journalArticlepeer-review

22 Scopus Citations


The improvement of power conversion efficiency, especially current density (Jsc), for nanocrystal quantum dot based heterojunction solar cells was realized by employing a trenched ZnO film fabricated using nanoimprint techniques. For an optimization of ZnO patterns, various patterned ZnO films were investigated using electrical and optical analysis methods by varying the line width, interpattern distance, pattern height, and residual layer. Analyzing the features of patterned ZnO films allowed us to simultaneously optimize both the pronounced electrical effects as well as optical properties. Consequently, we achieved an enhancement in Jsc from 7.82 to 12.5 mA cm -2 by adopting the patterned ZnO with optimized trenched shape.

Original languageAmerican English
Pages (from-to)3803-3808
Number of pages6
JournalACS Applied Materials and Interfaces
Issue number9
StatePublished - 8 May 2013

NREL Publication Number

  • NREL/JA-5900-60296


  • depleted heterojunction
  • lead sulfide quantum dots
  • nanoimprinting
  • nanostructured interface
  • patterned ZnO
  • quantum dot solar cells


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