Tunable Upconverted Circularly Polarized Luminescence in Cellulose Nanocrystal Based Chiral Photonic Films

Wei Li; Mingcong Xu; Chunhui Ma; Yushan Liu; Jin Zhou; Zhijun Chen; Yonggui Wang; Haipeng Yu; Jian Li; Shouxin Liu

doi:10.1021/acsami.9b05941

Tunable Upconverted Circularly Polarized Luminescence in Cellulose Nanocrystal Based Chiral Photonic Films

ACS Appl Mater Interfaces. 2019 Jul 3;11(26):23512-23519. doi: 10.1021/acsami.9b05941. Epub 2019 Jun 18.

Authors

Wei Li¹, Mingcong Xu¹, Chunhui Ma¹, Yushan Liu¹, Jin Zhou², Zhijun Chen¹, Yonggui Wang¹, Haipeng Yu¹, Jian Li¹, Shouxin Liu¹

Affiliations

¹ Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education , Northeast Forestry University , Harbin 150040 , China.
² CAS Key Laboratory of Nanosystem and Hierarchical Fabrication , National Center for Nanoscience and Technology (NCNST) , Beijing 100190 , China.

PMID: 31252503
DOI: 10.1021/acsami.9b05941

Abstract

Integrating chromophores into chiral photonic crystals to fabricate materials that exhibit circularly polarized luminescence (CPL) is promising as this method allows efficient manipulation of the spontaneous emission within photonic bandgaps (PBGs). However, tuning the wavelength of CPL and the dissymmetry factor ( g_lum) in a convenient and accurate manner remains a significant challenge. Here, right-handed, tunable upconverted CPL (UC-CPL) emission was achieved by integrating multiple emissive, upconverting nanoparticles into cellulose nanocrystal based chiral photonic films that had tunable PBGs. Glycerol was used to tune the PBGs of the chiral photonic films, which yielded tunable UC-CPL emission at 450 and 620 nm with a tailored g_lum. Moreover, humidity responsive UC-CPL at blue wavelength was obtained from glycerol-composite photonic film, with a g_lum that ranged from -0.156 to -0.033. It was possible because the PBG and chirality of photonic composite was responded to the relative humidity. This work gives valuable insight into tunable and stimuli-responsive CPL photonic systems.

Keywords: cellulose nanocrystals; photonic band gap; responsive; tunable; upconverted circularly polarized luminescence.