Zinc dopant inspired enhancement of electron injection for CuInS₂quantum dot-sensitized solar cells

Abstract

The PCE of doped CuInS2QDSCs increased from 5.21% to 5.90%, due to broadened optoelectronic response range and accelerated electron injection.

Nanostructure–Optical Property Relationship in CuInSe2/ZnS Core/Shell Quantum Dots Revealed by Multivariate Statistical Analysis of X-ray Spectrum Images

“…The Zn doping into the cores was also supported by the blue shifts observed in the absorption and PL spectra in Figure S3. Previous studies have reported that Zn doping reduces internal core defects and increases PL intensities. ,− ,, Thus, verification of the diffusion behavior of Zn atoms is informative for revealing the origins of temperature-dependent optical properties.…”

“…Previous studies have reported that Zn doping reduces internal core defects and increases PL intensities. 18,[21][22][23]25,26 Thus, verification of the diffusion behavior of Zn atoms is informative for revealing the origins of temperature-dependent optical properties. Verification of the Zn Diffusion Behavior from the ZnS Shell to the CISe Core.…”

“…One strategy is surface passivation by forming core/shell structures. − In general, core/shell QDs have few-monolayer-thick epitaxially grown shells, and by protecting their core surfaces, nonradiative recombination due to surface traps is suppressed. − The other strategy is compositional tuning by forming alloys or solid solutions . Introducing different elements into QD cores not only improves quantum yields owing to a decrease in internal defects but also enables tuning of band gaps owing to a variation in the lattice constants. − Although previous studies have succeeded in synthesizing QDs with improved properties using these strategies, most of the papers focused on structures inferred from spectroscopic or macroscopic analyses, and there are few detailed reports on actual nanostructures. Therefore, revealing the nanostructure–properties relationship is highly desired to elucidate the origins of improved properties and provide a guideline for designing QDs with desired properties.…”

Preciously Determining Energy Levels and Screening Extraction Medium to Design Highly Efficient Carriers Transport Pathways for Zn‐CuInS2 Quantum Dots Based H2 Generation Application

“…also demonstrated that after being doped with Zn, CuInS 2 quantum dots exhibit benign electronic properties. The rate constant of electron transfer from CIZS QDs to TiO 2 nanoparticles is greater than that of pure CuInS 2 QDs by an order of magnitude, which ultimately results in an enhanced power conversion efficiency of solar cells …”

Improved performance of low cost CuInS2superstrate-type solar cells using Zinc assisted spray pyrolysis processing

“…However, there is no report on the advantages of zinc in CuInS 2 solar cells. Recently, Wu et al [26] reported fabrication of zinc doped CuInS 2 quantum dot-sensitized solar cells under air circumstance. After being doped with zinc, CuInS 2 quantum dots (QDs) exhibited desired tunable optical and electronic properties, more specifically, photoluminescence (PL) emission and band gap.…”