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Lead sulfide colloidal quantum dot photovoltaic cell for energy harvesting from human body thermal radiation
- Source :
- Applied Energy. 230:761-768
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- In this paper, we present the development of a solution-processed photovoltaic structure designed to convert human body thermal radiation into electricity. An active layer composed of a layer of isopropylamine-capped lead sulfide (PbS) quantum dots (QDs) covered with a layer of lithium chloride (LiCl) on top is sandwiched between a substrate and an aluminum contact. Experimental measurements reveal that the device was sensitive to infrared radiation with energies lower than the optical bandgap energy of the incorporated nanocrystals (Eg = 1.26 eV), allowing one to harvest thermal radiation from a human body. We used a conceptually different approach to harvest this radiation by intentionally introducing mid-gap states to the lead sulfide quantum dots through passivation with isopropylamine and likely enabling a multi-step photon absorption mechanism.
- Subjects :
- Materials science
Passivation
business.industry
Infrared
020209 energy
Mechanical Engineering
02 engineering and technology
Building and Construction
Substrate (electronics)
Management, Monitoring, Policy and Law
021001 nanoscience & nanotechnology
chemistry.chemical_compound
General Energy
chemistry
Thermal radiation
Quantum dot
Photovoltaics
0202 electrical engineering, electronic engineering, information engineering
Optoelectronics
Lead sulfide
0210 nano-technology
business
Absorption (electromagnetic radiation)
Subjects
Details
- ISSN :
- 03062619
- Volume :
- 230
- Database :
- OpenAIRE
- Journal :
- Applied Energy
- Accession number :
- edsair.doi...........dc5df15f30d6efeb876d402021001828