Multiple-exciton generation in lead selenide nanorod solar cells with external quantum efficiencies exceeding 120.

Multiple-exciton generation-a process in which multiple charge-carrier pairs are generated from a single optical excitation-is a promising way to improve the photocurrent in photovoltaic devices and offers the potential to break the Shockley-Queisser limit. One-dimensional nanostructures, for example nanorods, have been shown spectroscopically to display increased multiple exciton generation efficiencies compared with their zero-dimensional analogues. Here we present solar cells fabricated from PbSe nanorods of three different bandgaps. All three devices showed external quantum efficiencies exceeding 100% and we report a maximum external quantum efficiency of 122% for cells consisting of the smallest bandgap nanorods. We estimate internal quantum efficiencies to exceed 150% at relatively low energies compared with other multiple exciton generation systems, and this demonstrates the potential for substantial improvements in device performance due to multiple exciton generation.NJLKD thanks the Cambridge Commonwealth European and International Trust, Cambridge Australian Scholarships and Mr Charles K Allen for financial support. MLB thanks the German National Academic Foundation (“Studienstiftung”) for financial support. MT thanks the Gates Cambridge Trust, EPSRC and Winton Programme for Sustainability for financial support. F.W.R.R. gratefully thanks financial support from CNPq [Grant number 246050/2012-8]. C.D. acknowledges financial support from the EU [Grant number 312483 ESTEEM2]. This work was supported by the EPSRC [Grant numbers EP/M005143/1, EP/G060738/1, EP/G037221/1] and the ERC [Grant number 259619 PHOTO-EM].This is the final version of the article. It first appeared from Nature Publishing Group via http://dx.doi.org/10.1038/ncomms925

Highly-Efficient Perovskite Nanocrystal Light-Emitting Diodes Enabled by a Universal Cross-linking Method

This work was supported by the EPSRC [Grant numbers EP/M005143/1, EP/J017361/1 and EP/G037221/1]. G.L. thanks Gates Cambridge Trust for funding. F.W.R.R. is grateful for financial support from CNPq [Grant number 246050/2012-8]. N.J.L.K.D. thanks the Cambridge Commonwealth European and International Trust, Cambridge Australian Scholarships and Mr Charles K. Allen for financial support. F.W.R.R., F.D.P. and C.D. acknowledge funding from the ERC under grant number 259619 PHOTO-EM. C.D. acknowledges financial support from the EU under grant number 312483 ESTEEM2. F.G. acknowledges financial support from the Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linköping University.This is the final version of the article. It first appeared from Wiley via https://doi.org10.1002/adma.20160006

Multiple exciton generation in quantum dot-based solar cells

Multiple exciton generation (MEG) in quantum-confined semiconductors is the process by which multiple bound charge-carrier pairs are generated after absorption of a single high-energy photon. Such charge-carrier multiplication effects have been highlighted as particularly beneficial for solar cells where they have the potential to increase the photocurrent significantly. Indeed, recent research efforts have proved that more than one charge-carrier pair per incident solar photon can be extracted in photovoltaic devices incorporating quantum-confined semiconductors. While these proof-of-concept applications underline the potential of MEG in solar cells, the impact of the carrier multiplication effect on the device performance remains rather low. This review covers recent advancements in the understanding and application of MEG as a photocurrent-enhancing mechanism in quantum dot-based photovoltaics

Research data supporting "Multiple-exciton generation in lead selenide nanorod solar cells with external quantum efficiencies exceeding 120%"

Data underlying the figures in this publication.This work was supported by the ERC [grant numbers EP/M005143/1, EP/G060738/1, EP/G037221/1] and EPSRC [grant numbers 259619 PHOTO-EM, 312483 ESTEEM2]

Research data supporting "Lead Telluride Quantum Dot Solar Cells Displaying External Quantum Efficiencies Exceeding 120%"

The data is the basis for all Figures in the manuscript and Supporting Information.This work was supported by the ERC [grant numbers 259619 PHOTO-EM,312483 ESTEEM2], EPSRC [grant numbers EP/M005143/1, EP/G060738/1, EP/G037221/1], and the CNPq [grant number 246050/2012-8]

Research data supporting "Hot-carrier cooling and photoinduced refractive index changes in organic–inorganic lead halide perovskites"

Figures and Supplementary Figures as embedded objects in a powerpointThis record supports publication and is available at http://dx.doi.org/10.1038/ncomms9420This work was supported by the EPSRC [grant number BR 4869_1-1] and the Deutsche Forschungsgemeinschaft, Winton Programme (Cambridge) for the Physics of Sustainabilit

Research data supporting "Hot-carrier cooling and photoinduced refractive index changes in organic–inorganic lead halide perovskites"

Figures and Supplementary Figures as embedded objects in a powerpointThis record supports publication and is available at http://dx.doi.org/10.1038/ncomms9420This work was supported by the EPSRC [grant number BR 4869_1-1] and the Deutsche Forschungsgemeinschaft, Winton Programme (Cambridge) for the Physics of Sustainabilit

Research data supporting "Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals"

The uploaded data is the basis for all figures presented in the manuscript and the Supporting InformationThis research data supports “Synthesis and Optical Properties of Lead-Free Cesium Tin Halide Perovskite Nanocrystals” which has been published in “Journal of the American Chemical Soceity”.This work was supported by the EPSRC [grant numbers EP/261 M005143/1, EP/G060738/1 and EP/G037221/1], Royal Society, Winton Program for the Physics of Sustainability and Gates Cambridge Trust