Ultrafast Interfacial Electron and Hole Transfer from CsPbBr<sub>3</sub> Perovskite Quantum Dots

Wu, Kaifeng; Liang, Guijie; Shang, Qiongyi; Ren, Yueping; Kong, Degui; Lian, Tianquan

doi:10.1021/jacs.5b08520

Cited by 489 publications

(678 citation statements)

References 50 publications

Supporting

Mentioning

593

Contrasting

Unclassified

Order By: Relevance

“…Owing to the large Bohr radius calculated for CsPbCl 3 (5 nm), CsPbBr 3 (7 nm), and CsPbCl 3 (12 nm), quantum confinement was observed. [15] With transient absorption spectroscopy (TA), it was determined that the high quantum yields arise from negligible electron-hole trapping pathways, [86] and an average PL life-time of τ = 1-29 ns was recorded, with the lowest value for CsPbCl 3 (≈1 ns; PLQY ≈ 50%). [15,77,86] Unlike semiconductor QDs, no spectral broadening originating from the high surface trap densities (due to the large surface-to-volume ratio), or size-distribution, was observed.…”

Section: Reviewmentioning

confidence: 99%

Perovskite Materials for Light‐Emitting Diodes and Lasers

et al. 2016

View full text Add to dashboard Cite

Organic-inorganic hybrid perovskites have cemented their position as an exceptional class of optoelectronic materials thanks to record photovoltaic efficiencies of 22.1%, as well as promising demonstrations of light-emitting diodes, lasers, and light-emitting transistors. Perovskite materials with photoluminescence quantum yields close to 100% and perovskite light-emitting diodes with external quantum efficiencies of 8% and current efficiencies of 43 cd A(-1) have been achieved. Although perovskite light-emitting devices are yet to become industrially relevant, in merely two years these devices have achieved the brightness and efficiencies that organic light-emitting diodes accomplished in two decades. Further advances will rely decisively on the multitude of compositional, structural variants that enable the formation of lower-dimensionality layered and three-dimensional perovskites, nanostructures, charge-transport materials, and device processing with architectural innovations. Here, the rapid advancements in perovskite light-emitting devices and lasers are reviewed. The key challenges in materials development, device fabrication, operational stability are addressed, and an outlook is presented that will address market viability of perovskite light-emitting devices.

show abstract

Section: Reviewmentioning

confidence: 99%

Perovskite Materials for Light‐Emitting Diodes and Lasers

et al. 2016

View full text Add to dashboard Cite

show abstract

“…(Table 4) The key benefits of nanostructured perovskites are Eb increase and fast interfacial charge transport, which enables highly efficient lead halide perovskite quantum dot LEDs. [200] The first synthesis of MAPbBr3 perovskite nanoparticles using nanotemplates was reported by…”

Section: Nanostructured Perovskite Crystalsmentioning

confidence: 99%

Hybrid Perovskites: Effective Crystal Growth for Optoelectronic Applications

Jeon

Kim

Yoon

et al. 2017

Advanced Energy Materials

View full text Add to dashboard Cite

Outstanding material properties of organic-inorganic hybrid perovskites have triggered a new research insight into the next-generation solar cells. Moreover, a wide range of controllable properties of hybrid perovskites particularly depending on crystal growth conditions enables versatile high performance optoelectronic devices such as light-emitting diodes, photodetectors and lasers beyond solar cells. This invited review article highlights recent progress of the crystallization strategies of organic-inorganic hybrid perovskites for effective light harvester or light emitter. In the first part, fundamental background on the perovskite crystalline structures and relevant optoelectronic properties such as optical band-gap, electron-hole behavior and energy band alignment are introduced. In the second part, detailed overview of the effective crystallization methods for perovskites, including thermal treatment, additives, solvent mediator, laser irradiation, nanostructure, crystal dimensionality and so on, is described to offer a comprehensive correlation among perovskite processing conditions, crystalline morphology and relevant device performances. Finally, future research direction is proposed to overcome current practical bottlenecks and move towards reliable high performance perovskite optoelectronic applications.3

show abstract

“…81,[92][93][94][95] No que tange à área de células solares, a princípio, um elevado rendimento quântico não é interessante, pois, pela definição do conceito, indica que a probabilidade da desativação do estado excitado pela emissão de fótons é grande. No entanto, um alto rendimento quântico indica baixa densidade de estados de armadilha presente no material, ou seja, o material apresenta uma alta qualidade óptica.…”

Section: Pontos Quânticos De Perovskitaunclassified

Células Solares De Perovskitas: Uma Nova Tecnologia Emergente

et al. 2017

View full text Add to dashboard Cite

Recebido em 31/01/2017; aceito em 7/8/2017; publicado na web em 02/10/2017 PEROVSKITES SOLAR CELLS: A NEW EMERGING TECHNOLOGY. Solar energy has been considered as an important source of clean and safe energy to overcome the problems associate to the burn of fossil fuels (e.g. climate changes, pollution, health problems, etc.). In the area of photovoltaics, devices that convert solar energy into electricity, perovskites solar cells (PSC) have attracted great attention due to their rapid development, high energy conversion efficiency, diversification of the processing methods and different materials. The fantastic properties of the hybrid perovskite materials, such as high absorption coefficient, direct and tunable bandgap, ambipolar charge carrier, simple preparation, etc., have quoted this technology as one the most important in this century. The rapid development of PSC has provided a significant increase in energy conversion efficiency, which was first reported, in 2009, as 3.8% and now reaches up to 22.10%, according to the National Laboratory of Renewable Energy (NREL). Many studies have been carried out to further increase the efficiency of devices and solve problems as the instability of the material, and the presence of lead, so that the PSC can be applied commercially. This paper presents a review on PSC and the major advances reported in device's architecture, preparation methods, novel materials and interface engineering.Keywords: solar cell; perovskites; perovskites solar cells. INTRODUÇÃOHá muitos anos a humanidade tem feito uso de combustíveis fósseis para satisfazer grande parte da demanda de energia. Porém, com a diminuição progressiva das reservas de combustíveis fósseis, deterioração do meio ambiente (devido ao efeito estufa), poluição do ar e água e, consequentemente, com os problemas de saúde humana associados ao aquecimento global, além das questões econômicas e políticas relacionadas à saúde e preservação do meio ambiente, o desenvolvimento de fontes alternativas de energia tem se tornado cada vez mais importante.1,2 Tendo em vista essas preocupações, a energia solar fotovoltaica pode ser considerada umas das fontes de energia alternativa mais promissora, pois provém de uma fonte abundante, limpa e segura, não gera ruídos e ainda permite a geração de energia elétrica em áreas remotas. 3A energia solar é, de uma forma ou de outra, a fonte de quase toda a energia na Terra.4 O sol fornece ao nosso planeta cerca de 10.000 vezes mais energia que o nosso consumo diário global. A energia solar pode ser convertida em calor, o qual pode ser utilizado diretamente para o abastecimento de água quente, ou em eletricidade, através do efeito fotovoltaico, nas células solares. 5,6 A constituição básica de uma célula solar é baseada em duas camadas de semicondutores (junção), sendo uma camada contendo carga positiva (p) e outra contendo carga negativa (n), que geram corrente elétrica quando expostas à radiação solar.7 Atualmente, as células solares são classificadas em três tipos, a saber: Células Solares de...

show abstract

Ultrafast Interfacial Electron and Hole Transfer from CsPbBr₃ Perovskite Quantum Dots

Cited by 489 publications

References 50 publications

Perovskite Materials for Light‐Emitting Diodes and Lasers

Perovskite Materials for Light‐Emitting Diodes and Lasers

Hybrid Perovskites: Effective Crystal Growth for Optoelectronic Applications

Células Solares De Perovskitas: Uma Nova Tecnologia Emergente

Contact Info

Product

Resources

About

Ultrafast Interfacial Electron and Hole Transfer from CsPbBr3 Perovskite Quantum Dots

Cited by 489 publications

References 50 publications

Perovskite Materials for Light‐Emitting Diodes and Lasers

Perovskite Materials for Light‐Emitting Diodes and Lasers

Hybrid Perovskites: Effective Crystal Growth for Optoelectronic Applications

Células Solares De Perovskitas: Uma Nova Tecnologia Emergente

Contact Info

Product

Resources

About

Ultrafast Interfacial Electron and Hole Transfer from CsPbBr₃ Perovskite Quantum Dots