Filterless narrowband visible photodetectors

Lin, Qianqian; Armin, Ardalan; Burn, Paul L.; Meredith, Paul

doi:10.1038/nphoton.2015.175

Cited by 468 publications

(531 citation statements)

References 48 publications

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“…16 Lin et al reported a new strategy to modulate MHPs optical and electrical properties based on molecular doping. 73 Recently, MHPs also attracted attention for X-ray detection. 74,75 Due to the large atomic number of lead, its compounds exhibit large X-ray absorption coefficients.…”

Section: Metal Halide Perovskite Photodetectorsmentioning

confidence: 99%

“…5 Its usage has been now expanded to metal halide perovskite films, single crystals and quantum dots. 73,111,112 Lin et al 73 have realized redgreen-blue narrowband photodiodes by introducing ionic dyes in lead iodide and lead perovskites with different halide ratios. The ionic dye reduces the crystallite size and suppresses the mobility.…”

Section: Selective Photodetection and Charge Collection Narrowing (Ccn)mentioning

confidence: 99%

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Solution-processed semiconductors for next-generation photodetectors

et al. 2017

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Section: Metal Halide Perovskite Photodetectorsmentioning

confidence: 99%

Section: Selective Photodetection and Charge Collection Narrowing (Ccn)mentioning

confidence: 99%

Solution-processed semiconductors for next-generation photodetectors

et al. 2017

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“…Suárez Alvarez: Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites As colloidal QDs, they exhibit a high PL quantum yield (up to 70%) at room temperature together with a tunable band-gap controlled by the composition [16,90]. Therefore, HPVKs layers have been successfully applied in a wide range of photonic devices, such as photodetectors [91,92] or light emitting diodes [90,93]. In addition, since HPVKs present a fast carrier formation and long recombination time, they are promising materials to reduce the stimulated emission threshold in active devices [94][95][96][97][98][99][100][101][102][103][104][105][106][107][108][109], as it has been nicely reviewed in [90].…”

Section: -P14mentioning

confidence: 99%

“…Nevertheless, properties of perovskite look promising in these directions, since they not only present interesting light emitting properties but also a high electron mobility and diffusion lengths, already exploited to develop solar cells [88], LEDs [89,92] or photodetectors [90,91].…”

Section: -P17mentioning

confidence: 99%

Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites

Suárez¹

2016

Eur. Phys. J. Appl. Phys.

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Abstract. Semiconductor nanocrystals have arisen as outstanding materials to develop a new generation of optoelectronic devices. Their fabrication under simple and low cost colloidal chemistry methods results in cheap nanostructures able to provide a wide range of optical functionalities. Their attractive optical properties include a high absorption cross section below the band gap, a high quantum yield emission at room temperature, or the capability of tuning the band-gap with the size or the base material. In addition, their solution process nature enables an easy integration on several substrates and photonic structures. As a consequence, these nanoparticles have been extensively proposed to develop several photonic applications, such as detection of light, optical gain, generation of light or sensing. This manuscript reviews the great effort undertaken by the scientific community to construct active photonic devices based on these nanoparticles. The conditions to demonstrate stimulated emission are carefully studied by comparing the dependence of the optical properties of the nanocrystals with their size, shape and composition. In addition, this paper describes the design of different photonic architectures (waveguides and cavities) to enhance the generation of photoluminescence, and hence to reduce the threshold of optical gain. Finally, semiconductor nanocrystals are compared to organometallic halide perovskites, as this novel material has emerged as an alternative to colloidal nanoparticles.

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“…[2][3][4][5][6][7][8][9] The in-depth understanding of the fundamental properties of such star material further promoted the advanced designs to meet the requirements toward practical conditions. [10][11][12][13] It has been demonstrated that the small exciton binding energy and hence efficient dissociation emission wavelengths make them promising emitters in LED and laser operations.…”

Section: Introductionmentioning

confidence: 99%

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

Chang

Bai

Zhong

2018

Advanced Optical Materials

181

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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Filterless narrowband visible photodetectors

Cited by 468 publications

References 48 publications

Solution-processed semiconductors for next-generation photodetectors

Solution-processed semiconductors for next-generation photodetectors

Active photonic devices based on colloidal semiconductor nanocrystals and organometallic halide perovskites

In Situ Fabricated Perovskite Nanocrystals: A Revolution in Optical Materials

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