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Silk Fluorescence Collimator for Ultrasensitive Humidity Sensing and Light‐Harvesting in Semitransparent Dye‐Sensitized Solar Cells
Author(s) -
Hu Fan,
Liu Wenzhe,
Li Weifeng,
Xu Zijie,
Diao Ying Ying,
Lin Nai Bo,
Guo Wenxi,
Shi Lei,
van Esch Jan H.,
Liu Xiang Yang
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201804171
Subject(s) - fluorescence , collimator , materials science , rhodamine 6g , optoelectronics , photonic crystal , rhodamine , optics , physics
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%.