Journal
ACS NANO
Volume 14, Issue 8, Pages 10359-10369Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c03986
Keywords
hybrid cells; carbon dots; triboelectric nanogenerator; solar energy; water droplet energy
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Funding
- Research Grants Council Early Career Scheme of HKSAR [24206919]
- HKSAR Innovation and Technology Support Programme Tier 3 [ITS/085/18]
- Chinese University of Hong Kong Direct Grant [4055086]
- Science Technology and Innovation Committee of Shenzhen Municipality [JCYJ20190808181201899]
- Liaoning Province Natural Science Foundation [20180550770]
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Energy harvesting has drawn worldwide attention as a sustainable technology, while combining several approaches in a single device to maximize the overall energy output holds great promise to offer valuable technologies able to alleviate the energy crisis. Here, we present a hybrid cell composed of a silicon solar cell and a water-droplet-harvesting triboelectric nanogenerator (WH-TENG) with the capacity of harvesting both solar and raindrop energies. A transparent and solution processable carbon dot-based composite film is introduced as a dual-functional layer, acting as the transmittance enhancement layer of the solar cell as well as an ionic conductor of the WH-TENG. At an optimal loading of carbon dots in the composite, the significant enhancement of transmittance in visible spectral range increases the short-circuit current density of the solar cell, which results in an increase of its power conversion efficiency from 13.6% to 14.6%. In addition, the transparent WH-TENG consisting of fluorinated ethylene propylene as a triboelectrification layer can generate a maximum power of 13.9 mu W by collecting raindrop energy. This study provides a promising strategy to boost the energy conversion through multiple sources with the aid of a dual-functional layer for enhancing solar cell performance as well as harvesting raindrop energy.
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