Silk Fluorescence Collimator for Ultrasensitive Humidity Sensing and Light-Harvesting in Semitransparent Dye-Sensitized Solar Cells

Fan Hu, Wenzhe Liu, Weifeng Li, Zijie Xu, Ying Ying Diao, Nai Bo Lin, Wenxi Guo, Lei Shi, Jan H. van Esch, Xiang Yang Liu

Research output: Contribution to journalArticleScientificpeer-review

6 Citations (Scopus)

Abstract

This work examines the self-collimation effect of silk materials on fluorescence emission/detection. A macroscopic regulation strategy, coupled with meso-reconstruction and meso-functionalization, is adopted to amplify the fluorescence emission of organic fluorescent dyes (i.e., Rhodamine 6G (R6G)) using silk photonic crystal (PC) films. The fluorescence emission can be linearly enhanced or inhibited by a PC as a result of the photonic bandgap coupling with the excitation light and/or emission light. Depending on the design of the silk fluorescence collimator, the emission can reach 49.37 times higher than the control. The silk fluorescence collimator can be applied to achieve significant benefits: for instance, as a humidity sensor, it provides good reproducibility and a sensitivity of 28.50 a.u./% relative humidity, which is 80.78 times higher than the sensitivity of the control, and as a novel curtain, it raises the energy conversion efficiency of the semitransparent dye-sensitized solar cells (DSSCs) by 16%.

Original languageEnglish
Article number1804171
Number of pages6
JournalSmall
Volume15
Issue number13
DOIs
Publication statusPublished - 2019

Keywords

  • fluorescence
  • mesoscopic structure
  • photonic crystals
  • self-collimation
  • silk

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