Hybrid downconverters with green perovskite-polymer composite films for wide color gamut displays

He, Jinwei; Chen, Haiwei; Wang, Yanan; Dong, Yajie

doi:10.1364/oe.25.012915

Cited by 74 publications

(43 citation statements)

References 33 publications

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“…In situ fabricated PNCs can be obtained by simply spin-coating a mixture of perovskite and polymer precursors [67][68][69][70] or through a controlled drying process [71] or swelling technique. [72,73] Such PNCs in polymer matrix (also denoted as PQD embedded composite films, PQDCF) take advantages in terms of simple processing and good film formability. The good water and oxygen resisting property of polymers make them promising for improving the stability of the yielded PNCs.…”

Section: The Roadmap Of Perovskite Nanocrystalsmentioning

confidence: 99%

See 1 more Smart Citation

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: The Roadmap Of Perovskite Nanocrystalsmentioning

confidence: 99%

“…2020 standard. [73] It is known that under adequate tensile force, the PVDF molecules may be stretched and aligned along the force direction. The alignment of PVDF molecules consequently leads to the spatial alignment of the inclusions within the composite film.…”

Section: On-surface Incorporationmentioning

confidence: 99%

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

Chang

Bai

Zhong

2018

Advanced Optical Materials

192

127

View full text Add to dashboard Cite

show abstract

“…Accordingly, the green emissive perovskite QDs were integrated to the backlight by adopting a novel solution, as shown in Figure 1b, the KSF with narrow emission was encapsulated in the blue LEDs to realize the simultaneous blue and red emission. The green emissive perovskite QDs were encapsulated into a film by using in-situ fabrication process, part of the blue light emited by the phosphor-converted LEDs excites the perovskite QDs to generate green light [10]. The white backlight with specific color temper- The above backlight structure does not apply to the perovskite Q In this paper, the red emissive KSF phosphor was replaced by the red LEDs.…”

Section: Hybrid Backlight System Based On the Dual Leds And Perovskitmentioning

confidence: 99%

37.5: Hybrid Backlight System based on Blue, Red LEDs and Perovskite Quantum Dots for Liquid Crystal Display Application

Jiang

et al. 2019

Symp Digest of Tech Papers

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This paper reports a novel backlight system for liquid crystal display by combining blue and red emissive LEDs and perovskite quantum dots embedded composite films as color converters. The backlights can realize 95% BT.2020 color gamut with a brightness of 90% relative to the backlight using blue LEDs and YAG. In comparison to the backlights using blue LEDs, perovskite quantum dots and K2SiF6:Mn4+ phosphors, this backlight system suppresses the tailing problem for dynamic dimming from red emissive K2SiF6:Mn4+ phosphors.

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“…We have envisioned that the outstanding green perovskite-polymer composite films could work synergistically with other red state-of-the art downconverters (i.e. quantum dots or narrow band phosphors) and enable low cost, efficient, color-vivid, and cadmium free back light unites (BLUs) for liquid crystal displays (LCDs) [4,5].…”

Section: Institute Of Functional Nano and Soft Materials (Funsom) Somentioning

confidence: 99%

37.3: Invited Paper: Update on Photoluminescent Perovskites and Electroluminescent Quantum Dots

Chen

Zhang

et al. 2019

Symp Digest of Tech Papers

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Hybrid downconverters with green perovskite-polymer composite films for wide color gamut displays

Cited by 74 publications

References 33 publications

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

37.5: Hybrid Backlight System based on Blue, Red LEDs and Perovskite Quantum Dots for Liquid Crystal Display Application

37.3: Invited Paper: Update on Photoluminescent Perovskites and Electroluminescent Quantum Dots

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