Up-converted photoluminescence from 
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 perovskite semiconductors: Implications for laser co

Yamada, Takumi; Aharen, Tomoko; Kanemitsu, Yoshihiko

doi:10.1103/physrevmaterials.3.024601

Cited by 34 publications

(41 citation statements)

References 40 publications

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“…Considering the fact that single crystals of Rb 2 CuCl 3 shows a 100% PLQY, and the maximum ASPL occurs at 395 nm (3.14 eV) under 520 nm (2.385 eV), using the above equation, an optical cooling efficiency of ≈32% is estimated. This value is similar to the highest values recently reported for hybrid perovskite10a,29 and all inorganic metal halides . Further detailed spectroscopic investigations including Raman spectroscopy is in progress to better understand the physical origin of the observed ASPL of Rb 2 CuCl 3 .…”

supporting

confidence: 85%

Rb₂CuX₃ (X = Cl, Br): 1D All‐Inorganic Copper Halides with Ultrabright Blue Emission and Up‐Conversion Photoluminescence

Creason

Yangui

Roccanova

et al. 2019

Advanced Optical Materials

106

183

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The United States Department of Energy (DOE) projects an estimated energy cost savings of $630 billion from 2015 to 2035 if reliable solid-state lighting technologies can be developed and DOE goals are met. [1] For the cost-effective implementation of light-emitting diodes (LEDs), development of new inexpensive light emitters is an urgent need. Owing to their outstanding photophysical properties including tunable bandgaps and emission colors, high photoluminescent quantum yields (PLQY) and excellent color purity, metal halide perovskite LEDs (PeLEDs)

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supporting

confidence: 85%

Rb₂CuX₃ (X = Cl, Br): 1D All‐Inorganic Copper Halides with Ultrabright Blue Emission and Up‐Conversion Photoluminescence

Creason

Yangui

Roccanova

et al. 2019

Advanced Optical Materials

106

183

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“…We will demonstrate that it provides a straightforward explanation for a number of unique phenomena observed in perovskites including: a direct observations of the PL anti-Stokes shift 19,22 , the energy difference between surface and bulk PL of single crystals 20,21 , and the optical cooling effects 22,49 .…”

Section: Anti-stokes Effectmentioning

confidence: 91%

The Bright Side and Dark Side of Hybrid Organic–Inorganic Perovskites

Walukiewicz

Wang

et al. 2020

J. Phys. Chem. C

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The previously developed bistable amphoteric native defect (BAND) model is used for a comprehensive explanation of the unique photophysical properties and for understanding the remarkable performance of perovskites as photovoltaic materials. It is shown that the amphoteric defects in donor (acceptor) configuration capture a fraction of photoexcited electrons (holes) dividing them into two groups: higher energy bright and lower energy dark electrons (holes). The spatial separation of the dark electrons and the dark holes and the k-space separation of the bright and the dark charge carriers reduce electron hole recombination rates, emulating the properties of an ideal photovoltaic material with a balanced, spatially separated transport of electrons and holes. The BAND model also offers a straightforward explanation for the exceptional insensitivity of the photovoltaic performance of polycrystalline perovskite films to structural and optical inhomogeneities. The blue-shifted radiative recombination of bright electrons and holes results in a large anti-Stokes effect that provides a quantitative explanation for the spectral dependence of the laser cooling effect measured in perovskite platelets.

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“…In this way, over the last 3–4 years, different experimental and theoretical reports have analyzed the efficiency of PR in HPs and the potential benefits in solar cells [ 13–15 ] or light‐emitting diodes, [ 15,16 ] among other devices. 15 In particular, experimental studies carried out in CH 3 NH 3 PbX 3 (X = Cl, Br, I) polycrystalline thin films, [ 17,18 ] CH 3 NH 3 PbX 3 single crystals, [ 10,19,20 ] CsPbBr 3 nano/microwires [ 21–23 ] or CsPbBr 3 nanocrystals [ 9 ] always show that PL spectra experience an important redshift and an elongation of the decay time after traversing some microns of the HP material. Although there has been a controversy about the impact of PR in the total PL spectra, [ 19,24 ] or if PR dominates or not over carrier diffusion on the effective decay time, [ 23,25 ] recent studies on perovskite single crystals [ 6 ] and MAPI polycrystalline thin films [ 18 ] confirm that PR is the dominant transport mechanism for propagation lengths longer than the diffusion of carriers.…”

Section: Introductionmentioning

confidence: 99%

Recycled Photons Traveling Several Millimeters in Waveguides Based on CsPbBr₃ Perovskite Nanocrystals

Navarro-Arenas

Suárez

Gualdrón‐Reyes

et al. 2021

Advanced Optical Materials

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Such multiple (re)absorption/(re)emission cycles result in a certain population of "recycled photons" concentrated inside the semiconductor. Consequently, an efficient PR effect provides another degree of freedom to control the photon and carrier densities in a semiconductor [2] and hence a way to tailor-made its optoelectronic properties. [3,4] Demonstrated applications include solar cells, light-emitting diodes, or optical modulators. [2] In this context, PR has been recently claimed in halide perovskites (HP), as an effect that could contribute to a certain extent to the excellent conversion efficiencies and emission rates reported for this family of semiconductors. [5,6] Indeed, the strong absorption coefficient above the bandgap and sharp (excitonic) band edge, [7,8] the small Stokes shift (SS) between photoluminescence (PL) and absorption, [9,10] and the high PL quantum yield (PLQY) [11,12] are outstanding characteristics of HPs and needed ingredients for leading to important PR effect. In this way, over the last 3-4 years, different experimental and theoretical reports have analyzed the efficiency of PR in HPs and the potential benefits in solar cells [13][14][15] or light-emitting diodes, [15,16] among other devices. 15 In particular, experimental studies carried out in CH 3 NH 3 PbX 3 (X = Cl, Br, I) polycrystalline thin films, [17,18] CH 3 NH 3 PbX 3 single crystals, [10,19,20] CsPbBr 3 nano/microwires [21][22][23] or CsPbBr 3 nanocrystals [9] always show that PL spectra experience an important redshift and an elongation of the decay time after traversing some microns of the HP material. Although there has been a controversy about the impact of PR in the total PL spectra, [19,24] or if PR dominates or not over carrier diffusion on the effective decay time, [23,25] recent studies on perovskite single crystals [6] and MAPI polycrystalline thin films [18] confirm that PR is the dominant transport mechanism for propagation lengths longer than the diffusion of carriers. Besides, the theoretical analysis predicts that multiple absorption and emission processes produce a certain "diffusive regime of traveling photons" that increases the effective lifetime of photons outcoupled from the sample (thin film, microwire, single crystal …). [26] Indeed, recent theoretical and experimental works demonstrated an enhancement of the open-circuit voltage in solar cells [14,18,27,28] or radiation efficiency in light-emitting diodes [29] when PR is optimized. The standard optical configuration that has been chosen to demonstrate the PR effect in most works consists of a semiconductor thin film deposited on a specific Reabsorption and reemission of photons, or photon recycling (PR) effect, represents an outstanding mechanism to enhance the carrier and photon densities in semiconductor thin films. This work demonstrates the propagation of recycled photons over several mm by integrating a thin film of CsPbBr 3 nanocrystals into a planar waveguide. An experimental set-up based on a frequency modulation spectroscopy allows to ch...

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Up-converted photoluminescence from CH3NH3PbI3 perovskite semiconductors: Implications for laser co

Cited by 34 publications

References 40 publications

Rb₂CuX₃ (X = Cl, Br): 1D All‐Inorganic Copper Halides with Ultrabright Blue Emission and Up‐Conversion Photoluminescence

Rb₂CuX₃ (X = Cl, Br): 1D All‐Inorganic Copper Halides with Ultrabright Blue Emission and Up‐Conversion Photoluminescence

The Bright Side and Dark Side of Hybrid Organic–Inorganic Perovskites

Recycled Photons Traveling Several Millimeters in Waveguides Based on CsPbBr₃ Perovskite Nanocrystals

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Up-converted photoluminescence from CH3NH3PbI3 perovskite semiconductors: Implications for laser co

Cited by 34 publications

References 40 publications

Rb2CuX3 (X = Cl, Br): 1D All‐Inorganic Copper Halides with Ultrabright Blue Emission and Up‐Conversion Photoluminescence

Rb2CuX3 (X = Cl, Br): 1D All‐Inorganic Copper Halides with Ultrabright Blue Emission and Up‐Conversion Photoluminescence

The Bright Side and Dark Side of Hybrid Organic–Inorganic Perovskites

Recycled Photons Traveling Several Millimeters in Waveguides Based on CsPbBr3 Perovskite Nanocrystals

Contact Info

Product

Resources

About

Rb₂CuX₃ (X = Cl, Br): 1D All‐Inorganic Copper Halides with Ultrabright Blue Emission and Up‐Conversion Photoluminescence

Rb₂CuX₃ (X = Cl, Br): 1D All‐Inorganic Copper Halides with Ultrabright Blue Emission and Up‐Conversion Photoluminescence

Recycled Photons Traveling Several Millimeters in Waveguides Based on CsPbBr₃ Perovskite Nanocrystals