Journal ArticleDOI
Core/Shell PbSe/PbS QDs TiO2 Heterojunction Solar Cell
Lioz Etgar,Lioz Etgar,Diana Yanover,Richard Capek,Roman Vaxenburg,Zhaosheng Xue,Bin Liu,Mohammad Khaja Nazeeruddin,Efrat Lifshitz,Michael Grätzel +9 more
TLDR
In this paper, quasi type-II PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO2 heterojunction solar cell.Abstract:
Quasi type-II PbSe/PbS quantum dots (QDs) are employed in a solid state high efficiency QD/TiO2 heterojunction solar cell. The QDs are deposited using layer-by-layer deposition on a half-micrometer-thick anatase TiO2 nanosheet film with (001) exposed facets. Theoretical calculations show that the carriers in PbSe/PbS quasi type-II QDs are delocalized over the entire core/shell structure, which results in better QD film conductivity compared to PbSe QDs. Moreover, PbS shell permits better stability and facile electron injection from the QDs to the TiO2 nanosheets. To complete the electrical circuit of the solar cell, a Au film is evaporated as a back contact on top of the QDs. This PbSe/PbS QD/TiO2 heterojunction solar cell produces a light to electric power conversion efficiency () of 4% with short circuit photocurrent (Jsc) of 17.3 mA/cm2. This report demonstrates highly efficient core/shell near infrared QDs in a QD/TiO2 heterojunction solar cell.read more
Citations
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Journal ArticleDOI
Designed Assembly and Integration of Colloidal Nanocrystals for Device Applications
TL;DR: Here, recent advances in the designed assembly, film fabrication, and printing/integration methods for colloidal nanocrystals are presented and various device applications of assembled/integrated colloid nanocrystal solids are discussed.
Journal ArticleDOI
Lychee-like FeS2@FeSe2 core–shell microspheres anode in sodium ion batteries for large capacity and ultralong cycle life
TL;DR: In this article, a lychee-like FeS2@FeSe2 core-shell microspheres were fabricated and used as an anode material for SIBs, delivering a high discharge capacity of 350 mA h g−1 at 1 A g −1 after 2700 cycles, and even up to 301.5 m A g− 1 after 3850 cycles with over 97% coulombic efficiency.
Journal ArticleDOI
A perspective of mesoscopic solar cells based on metal chalcogenide quantum dots and organometal-halide perovskites
TL;DR: In this article, the performance of a TiO2 solar cell sensitized with lead-iodide perovskite (CH3NH3PbI3) was optimized to attain an overall power conversion efficiency of 15%, which is a new milestone for solar cells of this type, with a device structure similar to that of a dye-sensitized solar cell.
Journal ArticleDOI
Influence of Shell Thickness and Surface Passivation on PbS/CdS Core/Shell Colloidal Quantum Dot Solar Cells
Darren C. J. Neo,Cheng Cheng,Samuel D. Stranks,Simon M. Fairclough,Judy S. Kim,Angus I. Kirkland,Jason M. Smith,Henry J. Snaith,Hazel E. Assender,Andrew A. R. Watt +9 more
TL;DR: In this paper, the authors showed that core/shell colloidal quantum dots can replace their unshelled counterparts with a similar band gap as the active layer in a solar cell device, leading to an improvement in open circuit voltage from 0.42 to 0.66 V.
Journal ArticleDOI
Colloidal Quantum Dots for Solar Technologies
TL;DR: In this paper, the authors discuss the chemical synthesis methods and properties of colloidal quantum dots (QDs) and emphasize their applications in solar cells, solar-driven hydrogen production, and luminescent solar concentrator devices.
References
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Journal ArticleDOI
Peak external photocurrent quantum efficiency exceeding 100% via MEG in a quantum dot solar cell.
Octavi E. Semonin,Octavi E. Semonin,Joseph M. Luther,Sukgeun Choi,Hsiang-Yu Chen,Jianbo Gao,Jianbo Gao,Arthur J. Nozik,Arthur J. Nozik,Matthew C. Beard +9 more
TL;DR: It is demonstrated that MEG charge carriers can be collected in suitably designed QD solar cells, providing ample incentive to better understand MEG within isolated and coupled QDs as a research path to enhancing the efficiency of solar light harvesting technologies.
Journal ArticleDOI
Synthesis of Titania Nanosheets with a High Percentage of Exposed (001) Facets and Related Photocatalytic Properties
TL;DR: Anatase TiO(2) nanosheets with highly reactive facets exposed have been successfully synthesized by a facile hydrothermal route, taking advantage of a specific stabilization effect of fluorine ion on (001) facets.
Journal ArticleDOI
Schottky Solar Cells Based on Colloidal Nanocrystal Films
Joseph M. Luther,Matt Law,Matthew C. Beard,Qing Song,Matthew O. Reese,Randy J. Ellingson,Arthur J. Nozik +6 more
TL;DR: This NC device produces one of the largest short-circuit currents of any nanostructured solar cell, without the need for sintering, superlattice order or separate phases for electron and hole transport.
Journal ArticleDOI
Depleted-Heterojunction Colloidal Quantum Dot Solar Cells
Andras G. Pattantyus-Abraham,Illan J. Kramer,Aaron R. Barkhouse,Xihua Wang,Gerasimos Konstantatos,Ratan Debnath,Larissa Levina,Ines Raabe,Mohammad Khaja Nazeeruddin,Michael Grätzel,Edward H. Sargent +10 more
TL;DR: In this article, the Schottky device was optimized and explained in terms of a depletion region driving electron−hole pair separation on the semiconductor side of a junction between an opaque low-work-function metal and a p-type CQD film.