Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Lu, Po; Lu, Min; Wang, Hua; Sui, Ning; Shi, Zhifeng; Yu, William W.

doi:10.1002/inf2.12031

Cited by 79 publications

(55 citation statements)

References 288 publications

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“…Integration of various photodetectors with different light‐sensitive materials and detecting capacity is an inevitable way to achieve the color/spectrum detection. However, the ingredient photodetector was usually individually prepared with uneven performance in most of the previous works 17,18. The existence of the cask effect would drag the overall performance behind, especially the response speed.…”

Section: Figurementioning

confidence: 99%

In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

et al. 2020

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Integration of various photodetectors with different light‐sensitive materials and detection capacity is an inevitable way to achieve entire color/spectrum detection. However, the uneven capacity of each photodetector would drag the overall performance behind, especially the response speed. A response time down to nanosecond level has not previously been reported for a filter‐free color/spectrum‐sensitive photodetector, as far as is known. Here, a self‐powered filterless color‐sensitive photodetection array based on an in situ formed gradient perovskite absorber film with continuously tunable bandgap is demonstrated. Ultrahigh‐speed response at nanosecond level is achieved in all the ingredient photodetectors. The junction capacitance being influenced by carrier concentration in the absorber is identified to be responsible for the detection speed. Without any optic or mechanical supporting system, the designed color detector exhibits an external quantum efficiency (EQE) up to 94% and a high spectral resolution of around 80 nm for the whole visible spectrum. This work offers a guidance to achieve fast response of perovskite‐based photodetectors from the point of view of carrier‐donor control and demonstrates a new avenue to establish color‐sensitive photodetectors/spectrometers.

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Section: Figurementioning

confidence: 99%

In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

et al. 2020

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“…A perovskite light absorber with an ideal bandgap and crystallization quality is the first hurdle of an artificial photon energy harvesting system 24. For perovskite materials with a crystal structure of ABX 3 , the composition engineering of A‐site and X‐site elements is an effective way to tune the bandgap 25–29.…”

Section: Resultsmentioning

confidence: 99%

Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications

Sun

Deng

Jiang

et al. 2020

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As the fastest developing photovoltaic device, perovskite solar cells have achieved an extraordinary power conversion efficiency (PCE) of 25.3% under AM 1.5 illumination. However, few studies have been devoted to perovskite solar cells harvesting artificial light, owing to the great challenge in the simultaneous manipulation of bandgap‐adjustable perovskite materials, corresponding matched energy band structure of carrier transport materials, and interfacial defects. Herein, through systematic morphology, composition, and energy band engineering, high‐quality Cs0.05MA0.95PbBrxI3−x perovskite as the light absorber and NbyTi1−yO2 (Nb:TiO2) as the electron transport material with an ideal energy band alignment are obtained simultaneously. The theoretical‐limit‐approaching record PCEs of 36.3% (average: 34.0 ± 1.2%) under light‐emitting diode (LED, warm white) and 33.2% under fluorescent lamp (cold white) are achieved simultaneously, as well as a PCE of 19.5% (average: 18.9 ± 0.3%) under solar illumination. An integrated energy conversion and storage system based on an artificial light response solar cell and sodium‐ion battery is established for diverse practical applications, including a portable calculator, quartz clock, and even environmental monitoring equipment. Over a week of stable operation shows its great practical potential and provides a new avenue to promote the commercialization of perovskite photovoltaic devices via integration with ingenious electronic devices.

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“…To predict the 3D structure forming possibility, Goldschmidt tolerance factor ( t ) and octahedral factor ( μ ) are used as empirical rules. The definitions of t and μ are as following:

t = \frac{R_{A} + R_{X}}{\sqrt{2} ((), R_{B} + R_{X})}

μ = \frac{R_{normalB}}{R_{normalX}}

where R A , R B , and R X are the effective radii of the A, B, and X ions, respectively . For a well‐established 3D network, t and μ are usually in the range of 0.8‐1.0 and 0.44‐0.9, respectively .…”

Section: Introductionmentioning

confidence: 99%

“…, and R X are the effective radii of the A, B, and X ions, respectively. 31,32 For a well-established 3D network, t and μ are usually in the range of 0.8-1.0 and 0.44-0.9, respectively. 10 Non-perovskite structures are often observed for impropersized ions, for example, large A cations like CH 3 CH 2 NH 3 + (t > 1.0) and small A cations like Rubidium (t < 0.8) will both lead to the collapse of the 3D structured network.…”

Section: Introductionmentioning

confidence: 99%

Low‐dimensional metal halide perovskites and related optoelectronic applications

Zhu

2020

InfoMat

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Low‐dimensional materials have pivotal significance in modern photonic, electronic, and optoelectronic areas due to their unique properties of the scale effect. Metal halide perovskites have revived in the optoelectronic fields recently, drawing intensive attention in photovoltaic devices, light‐emitting diodes, lasers, photodetectors, and so on. Compared to their three‐dimensional counterparts, the role of low‐dimensional perovskites is becoming crucial, requiring a comprehensive understanding and exploration unceasingly. In this review, we examine low‐dimensional perovskite of different forms and clarify various synthesis methods with morphological and dimensional control. Additionally, we also summarize potential optoelectronic applications based on their advantageous optical/electrical properties and enhanced mechanical integrity and stability. Finally, we propose a future perspective and possible developing directions in the exploration of novel perovskite‐derived materials, new physics, and promising applications.

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Metal halide perovskite nanocrystals and their applications in optoelectronic devices

Cited by 79 publications

References 288 publications

In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

Realizing Stable Artificial Photon Energy Harvesting Based on Perovskite Solar Cells for Diverse Applications

Low‐dimensional metal halide perovskites and related optoelectronic applications

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