Quantum dot solar cells

Abstract

We have been investigating the synthesis of quantum dots of CdSe, CuInS2, and CuInSe2 for use in an intermediate bandgap solar cell. We have prepared a variety of quantum dots, using the typical organometallic synthesis routes pioneered by Bawendi et al. in the early 1990s. However, unlike previous work in this area, we have also utilized single‐source precursor molecules in the synthesis process. We present XRD, TEM, SEM and EDS characterization of our initial attempts at fabricating these quantum dots. Investigation of the size distributions of these nanoparticles via laser light scattering and scanning electron microscopy is also presented. Theoretical estimates on appropriate quantum dot composition, size, and inter‐dot spacing along with potential scenarios for solar cell fabrication is discussed. Copyright © 2002 John Wiley & Sons, Ltd.

Luminescence studies of heat treatment influence on size distribution of CdTe nanocrystals

“…Due to unique optical properties and relatively simple methods of synthesis, semiconductor nanocrystals (NCs) grown in colloidal solutions are very attractive objects for both fundamental studies and applications such as light-emitting diodes [1][2][3], lasers [4,5] and photovoltaic devices [6,7]. Specifically, NCs of II-VI materials are prospective candidates for numerous applications in biological and biomedical fields due to enhanced photostability, narrow emission peaks and high fluorescence quantum yield [8].…”

Conformal P‐N junctions in macroporous silicon for photovoltaic energy conversion

“…Photovoltaic energy conversion is expected to make a major contribution in this area and much research has been directed beyond traditional solar cell technologies. Of the recent advancements in next generation photovoltaics, many involve the use of new materials; more specifically novel photoactive compounds such as quantum particles, up-and down-converters, organic molecules, polymers, dyes, as well as chromophores [2][3][4]. Many of these novel materials are interfaced with a semiconductor to complete the final device structure; however limitations in interfacing these photoactive compounds have thus far hindered the true potential of next generation devices.…”

Highly luminescent CdSe nanoparticles embedded in silica thin films

“…CdSe, an important member of luminescent II-VI family having bright luminescence in the visible range of optical spectra, has shown potential to be used in nanocrystalline form in biological field [5,6], displays [7,8], diodes and lasers [1], solar cells [9][10][11][12] and gas sensors [13][14][15]. A special class of materials having improved physical properties can be obtained by incorporating semiconductor nanoparticles in a non-conducting (dielectric) matrix [16,17].…”