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- Title
Thermal Properties of TiO<sub>2</sub>/PbS Nanoparticle Solar Cells.
- Authors
Padilla, Derek; Zhai, Guangmei; Breeze, Alison J.; Zhang, Daoli; Alers, Glenn B.; Carter, Sue A.
- Abstract
Photovoltaic performance is shown to depend on ligand capping on PbS nanoparticle solar cells by varying the temperature between 140K and 350K. The thermal response of open-circuit voltage, short-circuit current density, fill-factor and shunt resistance varies between the ligands. A large increase in short-circuit current density at low temperatures is observed for 1,2-ethanedithiol and 3-mercaptopropionic acid and a relatively constant shortcircuit current density is observed for the stiffer 1,4-benzenedithiol. Dark data provide evidence for tunnelling transport being the dominant charge conduction mechanism for all three ligand devices with recombination occurring within deep trap states. Under illumination, devices exhibit band-to-band recombination, indicated by an ideality factor of nearly unity.
- Subjects
SOLAR cells; TITANIUM dioxide; METAL nanoparticles; OPEN-circuit voltage; SHORT-circuit currents; QUANTUM tunneling; ENERGY bands
- Publication
Nanomaterials & Nanotechnology, 2012, Vol 2, Issue 2, p1
- ISSN
1847-9804
- Publication type
Article