Tuning the optical properties of Cs2SnCl6:Bi and Cs2SnCl6:Sb lead-free perovskites via post-annealing for white LEDs

Yan, Anping; Li, Kai; Zhou, Yao; Ye, Ying; Zhao, Xiujian; Liu, Chao

doi:10.1016/j.jallcom.2019.153528

Cited by 52 publications

(64 citation statements)

References 43 publications

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“…The Sn-based MHPs could also emit other colors like blue and red by ion doping. Just as Yan et al 28 reported, the Bi-doped Cs 2 SnCl 6 showed a cyan emission at 483 nm with a PLQY of 50.8%, and the Sb-doped Cs 2 SnCl 6 showed an orange-red emission at 630 nm with a PLQY of 41.6%. By simply incorporating these two Bi-, and Sb-doped Cs 2 SnCl 6 into the commercial UV-LEDs, a warm WLED (Figure 3C) could be obtained without using other commercial phosphors.…”

Section: Sn-based Lfmhpsmentioning

confidence: 70%

“…E, The PL spectra of white‐LED device at different driving currents. Reproduced with permission: Copyright 2019, Elsevier B.V 28 . F, Room temperature PLQY of Cs 2 SnCl 6 :xBi with x of 0%, 0.11%, 1.16%, 2.75%, 3.39%, 4.18%, and 6.63%.…”

Section: The Applications In Down‐conversion Uv‐led‐driven Wledsmentioning

confidence: 99%

“…25 These outstanding performances of LFMHPs intrigue great interests of researchers, and some meaningful progress has already been achieved, such as the photoluminescence quantum yields (PLQYs) have reached near 100% 26,27 and the benign applications in downconversion white light-emitting diodes (WLEDs). [28][29][30][31][32][33] However, the studies of the applications in lead-free Pero-LEDs are still lacking behind. Due to the poor filmforming property and the mismatched energy levels with the hole transport materials (HTMs) and electron transport materials (ETMs), the maximum EQE of lead-free Pero-LEDs is just 5%, 34 which is much lower than their lead-based counterparts.…”

Section: Introductionmentioning

confidence: 99%

“…More stable electroluminescence could be obtained because there is no need to exchange the halide anions for controlling the bandgaps 25 . These outstanding performances of LFMHPs intrigue great interests of researchers, and some meaningful progress has already been achieved, such as the photoluminescence quantum yields (PLQYs) have reached near 100% 26,27 and the benign applications in down‐conversion white light‐emitting diodes (WLEDs) 28‐33 . However, the studies of the applications in lead‐free Pero‐LEDs are still lacking behind.…”

Section: Introductionmentioning

confidence: 99%

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Lead‐free metal halide perovskites for light‐emitting diodes

Yan

Feng

et al. 2021

EcoMat

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Metal halide perovskites (MHPs) have been developing rapidly in recent years due to their outstanding optoelectronic properties and tremendous contributions from worldwide researchers. The external quantum efficiencies of perovskite light-emitting diodes (Pero-LEDs) have all exceeded 20% for the green, red, and near-infrared emitting ones. However, the toxicity and instability issues of the lead-based MHPs are still big problems limiting their practical applications. The applications of the lead-free MHPs (LFMHPs) are emerging as one of the most promising strategies to tackle these issues. Compared with lead-based MHPs, the LFMHPs show better environment stability and broader emission regions from the violet to near-infrared wavelength. Thanks to numerous contributions made by the researchers, great progress has already been made for the LFMHPs. For example, the photoluminescence quantum yield has reached near 100%. However, the performances of the lead-free Pero-LEDs are still lagging compared with their lead-based counterparts. In this review, we comprehensively summarize the synthesis developments of LFMHPs and their applications in the down-conversion white LEDs and electroluminescent Pero-LEDs. Moreover, some suggestions and outlooks of the lead-free Pero-LEDs developments are proposed in the end.

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Section: Sn-based Lfmhpsmentioning

confidence: 70%

Section: The Applications In Down‐conversion Uv‐led‐driven Wledsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Lead‐free metal halide perovskites for light‐emitting diodes

Yan

Feng

et al. 2021

EcoMat

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“…The PLQY is 14.3% and 11.1% for Cs 2 K x Ag 1Àx In 0.99 Bi 0.01 Cl 6 and Cs 2 Li y Ag 1Ày In 0.99 Bi 0.01 Cl 6 , respectively. Yan et al [152] have synthesized Cs 2 SnCl 6 :Bi and Cs 2 SnCl 6 :Sb double-perovskite crystals by solution method, and they studied the effect of annealing temperature on emission properties. The PLQY of Cs 2 SnCl 6 :Bi decreases from 68.9% to 50.8% due to annealing at 300 C. They indicated that the decrease is due to the increase in V Cl after annealing at 300 C. Interestingly for Cs 2 SnCl 6 :Sb, the PLQY increases from 19.8% to 41.6% due to annealing.…”

Section: Pb-free Ihp Ledsmentioning

confidence: 99%

All‐Inorganic Halide Perovskite Nanocrystals: Future Prospects and Challenges to Go Lead Free

Sarkar

2021

Physica Status Solidi (a)

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Organometallic halide perovskite (OHP) received tremendous attention from the science community for their unprecedented optoelectronic properties, such as large absorption coefficient, long electronÀhole diffusion length, high carrier mobility, and excellent tunability of optical bandgap. [1][2][3][4][5][6] Within 10 years, the efficiency of OHP-based solar cells increases from <10% to 25.5%. [7][8][9][10][11][12] Such unimaginable development speed overcomes all kinds of traditional semiconductors overwhelmingly. Typical OHP materials have the composition ABX 3 , where A is organic cation, methylammonium,B is a tetravalent metal cation (Pb; Sn; Ge); and X is a halide anion (Cl, Br, I). [13][14][15][16] Moreover, the fascinating tunability of absorption and emission wavelength along with high carrier mobility make it a potential candidate for light-emitting diodes (LEDs) and photodetector (PD) applications also. [17][18][19][20][21] Large-area, flexible, and several architectures of solar cells have been fabricated to meet the requirement of device integration and future applications. Despite all the aforementioned advantages, OHP nanocrystal (NC)-based devices face a major challenge in terms of stability. [22][23][24][25][26][27] The OHP NCs are extremely sensitive to oxygen and moisture; therefore, the synthesis and storage require a highly controlled environment. Apart from environment issues, photo-and thermal stability problems are also observed in OHP NCs. [28][29][30] Since past 3À4 years, efforts have been made to overcome stability issues. Stability has been improved by replacing methylammonium (MA) by formamidinium (FA), by integrating OHP with polymers, and using inorganic carrier transport layers instead of organic ones. [23,[30][31][32][33] People have tried to mix CsPbX 3 with OHP to get better device performance. Lee et al. [34] substituted FA þ ion by Cs þ partially and recorded higher stability against photons and humid environment. Saliba et al. [35] have synthesized MA þ , FA þ , and Cs þ mixed-perovskite NCs and observed good stability against ambient atmosphere. Despite all the efforts to stabilize the device, the stability for practical application is yet to be achieved. It is well known that the photo-and thermal stabilities of inorganic materials are much higher than that of the organic materials. Keeping all the issues in mind, Protesescu et al. [36] have synthesized all-inorganic halide perovskite (IHP) CsPbX 3 colloidal NCs. All IHP NCs show very good thermal and photostability, which make them promising replacements of OHP for future device applications. [37][38][39] 2. Inorganic Halide Perovskite (IHP) IHP materials are very closely related to the family of OHP materials, which can be exploited to overcome all the shortcomings of the latter. Investigations have shown that the inorganic monovalent cation Cs þ can satisfy the requirements of the ABX 3 structure, replacing MA þ and FA þ as the A-site ions to form highly thermal stable CsBX 3 perovskites (>350 C). At the same time, CsBX 3...

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Non‐lead Metal Halide Perovskite Materials

2023

Perovskite Light Emitting Diodes

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Tuning the optical properties of Cs2SnCl6:Bi and Cs2SnCl6:Sb lead-free perovskites via post-annealing for white LEDs

Cited by 52 publications

References 43 publications

Lead‐free metal halide perovskites for light‐emitting diodes

Lead‐free metal halide perovskites for light‐emitting diodes

All‐Inorganic Halide Perovskite Nanocrystals: Future Prospects and Challenges to Go Lead Free

Non‐lead Metal Halide Perovskite Materials

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