Melanin–Perovskite Composites for Photothermal Conversion

Kai Wang, Yuchen Hou, Bed Poudel, Dong Yang, Yuanyuan Jiang, Min Gyu Kang, Ke Wang, Congcong Wu, Shashank Priya

Research output: Contribution to journalArticle

Abstract

Biomacromolecular pigments, such as melanin, play an essential role in the survival of all living beings. Melanin absorbs sunlight and transforms it into heat, which is crucial for avoiding damage to skin cells. Light absorption produces excited electrons, which could either fall back to ground states by releasing the heat (photothermal effect) and/or light (photoluminescence), or stay at higher energy levels within its lifetime period, which can be captured through external electronic circuitry (photovoltaic effect). In this study, it is demonstrated that the combination of melanin with halide perovskite light absorber in the form of a composite exhibits high absorbance from the UV to NIR region in the solar spectrum. And the composite displays significantly reduced photoluminescence and minimized density of residual excited states (verified by photovoltaic measurement) owing to the significantly enhanced nonradiant quenching by the melanin. As a result, the composite shows an ultrahigh solar-thermal quantum yield of 99.56% and solar-thermal conversion efficiency of ≈81% under one-sun illumination (AM1.5), which is superior to typical carbon materials such as graphene (≈70%). By coating the photothermal composite film on the hot-side of thermoelectric devices, a 7000% increase in output power as compared to the blank device under illumination is observed.

Original languageEnglish (US)
Article number1901753
JournalAdvanced Energy Materials
Volume9
Issue number37
DOIs
StatePublished - Oct 1 2019

Fingerprint

Melanin
Melanins
Composite materials
Photoluminescence
Lighting
Photovoltaic effects
Graphite
Composite films
Quantum yield
Excited states
Pigments
Sun
Perovskite
Thermal effects
Graphene
Light absorption
Electron energy levels
Ground state
Conversion efficiency
Quenching

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Wang, Kai ; Hou, Yuchen ; Poudel, Bed ; Yang, Dong ; Jiang, Yuanyuan ; Kang, Min Gyu ; Wang, Ke ; Wu, Congcong ; Priya, Shashank. / Melanin–Perovskite Composites for Photothermal Conversion. In: Advanced Energy Materials. 2019 ; Vol. 9, No. 37.
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abstract = "Biomacromolecular pigments, such as melanin, play an essential role in the survival of all living beings. Melanin absorbs sunlight and transforms it into heat, which is crucial for avoiding damage to skin cells. Light absorption produces excited electrons, which could either fall back to ground states by releasing the heat (photothermal effect) and/or light (photoluminescence), or stay at higher energy levels within its lifetime period, which can be captured through external electronic circuitry (photovoltaic effect). In this study, it is demonstrated that the combination of melanin with halide perovskite light absorber in the form of a composite exhibits high absorbance from the UV to NIR region in the solar spectrum. And the composite displays significantly reduced photoluminescence and minimized density of residual excited states (verified by photovoltaic measurement) owing to the significantly enhanced nonradiant quenching by the melanin. As a result, the composite shows an ultrahigh solar-thermal quantum yield of 99.56{\%} and solar-thermal conversion efficiency of ≈81{\%} under one-sun illumination (AM1.5), which is superior to typical carbon materials such as graphene (≈70{\%}). By coating the photothermal composite film on the hot-side of thermoelectric devices, a 7000{\%} increase in output power as compared to the blank device under illumination is observed.",
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Melanin–Perovskite Composites for Photothermal Conversion. / Wang, Kai; Hou, Yuchen; Poudel, Bed; Yang, Dong; Jiang, Yuanyuan; Kang, Min Gyu; Wang, Ke; Wu, Congcong; Priya, Shashank.

In: Advanced Energy Materials, Vol. 9, No. 37, 1901753, 01.10.2019.

Research output: Contribution to journalArticle

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AU - Wang, Ke

AU - Wu, Congcong

AU - Priya, Shashank

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