期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 32, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202101348
关键词
hole-transporting layers; inorganic cesium lead bromide perovskites; nanogenerators; surface potential regulation; triboelectric-photovoltaic coupling effects
类别
资金
- National Natural Science Foundation of China [61774139, 62004083, U1802257]
- Natural Science Foundation of Guangdong Province [2019B151502061, 2020A1515011123]
- Postdoctoral Research Foundation of China [2019M650231, 2019M663379]
- Fundamental Research Funds for the Central Universities [21619311, 21620348]
The combination of hole-extraction PDMS-MWCNTs composite film and CsPbBr3 in the fabrication of TENG leads to a significant enhancement of charge quantity through the triboelectric-photovoltaic coupling effect. The best hybrid TENG achieved a dramatically increased transferred charge under illumination compared to the pristine PDMS based TENG, demonstrating a promising conductive triboelectric counterpart for efficient charge separation and extraction towards boosting current density in hybrid triboelectric-photovoltaic devices.
Coupled triboelectric-photovoltaic effect by collecting photogenerated charge carriers is increasingly important to dramatically improve the short-circuit current output of triboelectric nanogenerators (TENG), especially for the all-inorganic cesium lead bromide (CsPbBr3) halide perovskite combined with the optoelectronic and dielectric properties as a fundamental friction layer in TENG. Herein, hole-extraction polydimethylsiloxane (PDMS)-multi-wall carbon nanotubes (MWCNTs) composite film (PC) is applied into the fabrication of vertical contact-separation mode CsPbBr3/PC hybrid TENG with dual role of negative triboelectrification layer and photogenerated hole collector. Through precisely regulating the surface potential of PC films by tuning the MWCNT loadings, the charge quantity is greatly enhanced thanks to the triboelectric-photovoltaic coupling effect. The best hybrid TENG at MWCNTs loading of 16 wt% achieves a transferred charge of 0.358 mC under illumination, which is nearly 30,000 times higher than that of the pristine PDMS based TENG. Impressively, the champion hybrid TENG at MWCNTs loading of 12 wt% yields a power rating density of 8.24 W m(-2). This work demonstrates the PC hole collector to be a promising conductive triboelectric counterpart for efficient charge separation and extraction toward booting current density of hybrid triboelectric-photovoltaic devices.
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