Abstract
Colloidal quantum dots (CQDs) are considered as next-generation semiconductors owing to their tunable optical and electrical properties depending on their particle size and shape. The characteristics of CQDs are mainly governed by their surface chemistry, and the ligand exchange process plays a crucial role in determining their surface states. Worldwide studies toward the realization of high-quality quantum dots have led to advances in ligand exchange methods, and these procedures are usually carried out in either solid-state or solution-phase. In this article, we review recent advances in solid-state and solution-phase ligand exchange processes that enhance the performance and stability of lead sulfide (PbS) CQD solar cells, including infrared (IR) CQD photovoltaics.
Highlights
Even though the world has been dominated by the prevalence of fossil fuels, their limited reserves and associated environmental issues make it difficult to fulfill the ever-growing global energy exigencies, and the development of renewables is essential to meet these rapidly expanding energy demands
Colloidal quantum dots (CQDs) are small-sized semiconducting nanoparticles, wherein the size of nanoparticle is smaller than its exciton Bohr radius, showing the quantum confinement effect, and CQDs have been considered as promising candidates to realize efficient solution-processed solar cells due to their tunable optoelectrical characteristics according to their size and outstanding ambient stability [1,2,3]
We summarize recent achievements in performance and stability of lead sulfide (PbS) CQD ligand exchange procedures for solar cell We summarize recent achievements in PbS CQD ligand exchange procedures for solar cell applications
Summary
Even though the world has been dominated by the prevalence of fossil fuels, their limited reserves and associated environmental issues make it difficult to fulfill the ever-growing global energy exigencies, and the development of renewables is essential to meet these rapidly expanding energy demands. Colloidal quantum dots (CQDs) are small-sized semiconducting nanoparticles, wherein the size of nanoparticle is smaller than its exciton Bohr radius, showing the quantum confinement effect, and CQDs have been considered as promising candidates to realize efficient solution-processed solar cells due to their tunable optoelectrical characteristics according to their size and outstanding ambient stability [1,2,3]. Beyond these merits, the multiple exciton generation (MEG) phenomenon in CQDs can be a breakthrough to improve the performance of CQD solar cells [4,5].
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