Semiconductor Nanocrystals as Luminescent Down-Shifting Layers To Enhance the Efficiency of Thin-Film CdTe/CdS and Crystalline Si Solar Cells

Kalytchuk, Sergii; Gupta, Shuchi; Zhovtiuk, Olga; Vaneski, Aleksandar; Kershaw, Stephen V.; Fu, Huiying; Fan, Zhiyong; Kwok, Eric Chi-Ho; Wang, Chiou-Fu; Teoh, Wey Yang; Rogach, Andrey L.

doi:10.1021/jp410279z

Cited by 84 publications

(47 citation statements)

References 41 publications

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“…Before the invention of PNCs, organic dyes, [136,137] rare earth doped compounds [138] and colloidal QDs [139,140] have been explored as down-shifting materials for enhancing the UV response of Si based charge coupled device (CCD), CMOS devices, and solar cells. However, the severe UV degradation issue [141,142] of organic dyes and rare earth ions doped compounds, the aggregation induced scattering loss and PL quenching [143] problem of colloidal QD based enhancing films hinders further optimization of these techniques.…”

Section: Enhanced Uv Response Of Silicon Photodetectorsmentioning

confidence: 99%

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

Chang

Bai

Zhong

2018

Advanced Optical Materials

192

127

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in bulk halide perovskites, long carrier diffusion length, and an absorption range covering the visible solar spectrum, collectively enable the high performance of photo electricity conversion. Compared to the bulk materials, perovskite nanocrystals or quantum dots (usually denoted as PNCs or PQDs) show obvious excitonic features with enhanced photoluminescence (PL) properties due to the well-known size-dependent quantum confinement effects. [14][15][16][17] The combination of color saturated emissions, super high quantum yield (QY), as well as easy processing inspired the intensive exploration of PNCs as light emitters, which is now under spotlights in the field of optical materials.The first perspective aim of PNCs is to alternate the state-of-the-art CdSe or InP quantum dots (QDs) as new generation luminescence materials. [18,19] As shown in Figure 1, these QD materials have been well demonstrated to be potential functional components for photonic and optoelectronic applications, and are currently on the way to industrialization. [20][21][22][23] Specifically, QDs can be employed as fluorescence labels, [24] laser gain media, [25] LED phosphors, [26] and down-shifting films for LCD backlights. [27,28] They can also be processed into thin film for optoelectronic devices including solar cells, [29] photodetectors, [30,31] transistors [32] and LEDs. [33] The PNCs outcompete these conventional QDs in terms of narrower full width at half maximum (FWHM) and low fabrication cost, but most importantly, the ease of in situ preparation. [34,35] Herein, this progress report highlight the developments of in situ fabricated PNCs.Colloidal semiconductor QDs are typically synthesized ex situ in flasks by hot injection method, stabilized by surface ligands. [36][37][38][39] To incorporate such solution based materials into applications usually requires purification, redispersion and surface engineering. For instance, ligand exchange is often employed to disperse QDs into aimed solvent, inducing defects that inevitably derogating the PLQYs. [40] Moreover, the organic ligands themselves also suffer from the risk of disabsorbing, reducing the stability of the QDs and thus the final devices. [41] Because halide perovskite are ionic compounds that can be well dissolved into polar solvents, PNCs can be fabricated through either ex situ routes in flask or in situ strategies on substrates. The in situ fabricated PNCs are adaptable to devices integration due to their scalable and low-cost manufacturing. In this regard, more and more efforts have been made in terms of the controlling synthesis, physical properties and device applications of PNC materials.After over 30 years of development, colloidal quantum dots have now become mature luminescent materials in photonic and optoelectronic operations and start to hit the market. The emerging perovskite nanocrystals are expected to promote large-scale commercialization due to their superior optical properties as well as low cost and easy fabrication. This progress report is focused on the...

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Section: Enhanced Uv Response Of Silicon Photodetectorsmentioning

confidence: 99%

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

Chang

Bai

Zhong

2018

Advanced Optical Materials

192

127

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“…A large number of luminescent materials have been investigated for LDS and can be separated into three main categories: quantum dots (QDs) [14][15][16][17][18], organic dyes [7][8][9] and rare-earth ions/complexes [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of down-shifting film for silicon solar cell based on the stilben 420, PVA polymer and silver nanoparticles

Mantel¹,

Irgibaeva²,

Aldongarov³

et al. 2017

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We have developed method of preparation of luminescent polymer films based on polyvinyl alcohol (PVA), organic dyestilben 420 (St420) and silver nanoparticles (AgNPs). Concentration of St420 which provides most efficient luminescence quantum yield was determined for PVA film. It was found that addition of 10 nm AgNPs to St420 samples in PVA leads to increase of absorption intensity and decrease of luminescence intensity. Quenching of emission of St420 by addition of AgNPs is probably due to charge transfer from the dye to metal nanoparticles. External quantum efficiency (EQE) curves of St420 PVA were measured for optimal concentration of the dye. Some decrease of EQE curve was observed for down-shifting (DS) layer of St420. At the same time some increase of efficacy ofsolar cell (SC) was observed based on I-V measurements.

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“…Semiconductor quantum dots have been also used for LDS purposes in photovoltaics [7,8]. Their small sizes and sensitivity to surrounding medium enable the production of transparent layers with tunable absorption and emission bands [9,10]. Such layers can be adjusted to specific photovoltaic devices and raise their overall efficiency.…”

Section: Introductionmentioning

confidence: 99%

Highly transmissive luminescent down-shifting layers filled with phosphor particles for photovoltaics

Solodovnyk¹,

Forberich²,

Stern³

et al. 2015

Opt. Mater. Express

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Abstract:We study the optical properties of polymer layers filled with phosphor particles in two aspects. First, we used two different polymer binders with refractive indices n = 1.46 and n = 1.61 (λ = 600 nm) to study the influence of Δn with the phosphor particles (n = 1.81). Second, we prepared two particle size distributions D 50 = 12 µm and D 50 = 19 µm. The particles were dispersed in both polymer binders in several volume concentrations and coated with thicknesses of 150-600 µm onto glass substrates. Experimental results and numerical simulations show that the layers of the higher refractive index binder with larger particles result in the highest optical transmittance in the visible light spectrum. Finally, we used numerical simulations to determine optimal layer composition for application in realistic photovoltaic devices.

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Semiconductor Nanocrystals as Luminescent Down-Shifting Layers To Enhance the Efficiency of Thin-Film CdTe/CdS and Crystalline Si Solar Cells

Cited by 84 publications

References 41 publications

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

Preparation and characterization of down-shifting film for silicon solar cell based on the stilben 420, PVA polymer and silver nanoparticles

Highly transmissive luminescent down-shifting layers filled with phosphor particles for photovoltaics

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