TY - JOUR
T1 - Water driven photoluminescence enhancement and recovery of CH3NH3PbBr3/Silicon oil/PDMS-urea composite
AU - Luo, Chunhua
AU - Huang, Sihui
AU - Zhang, Ting
AU - Jiang, Chunli
AU - Qi, Ruijuan
AU - Liu, Mengqin
AU - Lin, Hechun
AU - Travas-Sejdic, Jadranka
AU - Peng, Hui
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/9/5
Y1 - 2020/9/5
N2 - Lead halide perovskites (LHPs) are very promising for new optoelectronic devices due to their excellent optical and electronic properties. However, the poor stability against water, heat and UV light greatly restricts their practical applications. In this work, a CH3NH3PbBr3/silicon oil/PDMS-urea composite is prepared by encapsulating CH3NH3PbBr3 nanocrystals and silicon oil into the PDMS-urea polymer matrix. This composite shows characteristics of water-enhanced photoluminescence (PL) and water-driven PL recovery. After immersed in water, the photoluminescence quantum yield of the composite increases from initial 26.0%–52.2%, which is ascribed to the passivation of surface defects by the capping of polymer chains, H3O+ and OH−. The composite possesses superior stability against UV light illumination in water. Furthermore, the composite film exhibits a capability of water-driven PL recovery after UV light irradiation. By applying alternate water/UV treatments, the PL can be reversibly switched “on and off”. The “on/off” ratio value of the PL intensity reached more than 4. These advantages make this composite highly promising in applications utilising luminescent switching and for under water lighting.
AB - Lead halide perovskites (LHPs) are very promising for new optoelectronic devices due to their excellent optical and electronic properties. However, the poor stability against water, heat and UV light greatly restricts their practical applications. In this work, a CH3NH3PbBr3/silicon oil/PDMS-urea composite is prepared by encapsulating CH3NH3PbBr3 nanocrystals and silicon oil into the PDMS-urea polymer matrix. This composite shows characteristics of water-enhanced photoluminescence (PL) and water-driven PL recovery. After immersed in water, the photoluminescence quantum yield of the composite increases from initial 26.0%–52.2%, which is ascribed to the passivation of surface defects by the capping of polymer chains, H3O+ and OH−. The composite possesses superior stability against UV light illumination in water. Furthermore, the composite film exhibits a capability of water-driven PL recovery after UV light irradiation. By applying alternate water/UV treatments, the PL can be reversibly switched “on and off”. The “on/off” ratio value of the PL intensity reached more than 4. These advantages make this composite highly promising in applications utilising luminescent switching and for under water lighting.
KW - Lead halide perovskites
KW - Nanocrystals
KW - Photoluminescence recovery
KW - Polymer composite
KW - Water induced
UR - https://www.scopus.com/pages/publications/85083319442
U2 - 10.1016/j.jallcom.2020.155088
DO - 10.1016/j.jallcom.2020.155088
M3 - 文章
AN - SCOPUS:85083319442
SN - 0925-8388
VL - 834
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 155088
ER -