Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(6)

Published: Oct. 27, 2023

Abstract Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, radiation detectors. The impressive optical optoelectronic properties, along with rapid increase efficiencies cells LEDs, greatly attracted researchers across many disciplines. However, most advances made so far terms preparation (colloidal nanocrystals films), devices highest are based on Pb‐based halide which raised concerns over their commercialization due to toxicity Pb. This has triggered search lower‐toxicity Pb‐free perovskites led significant progress last few years. In this roadmap review, different expertise joined together summarize latest progress, outstanding challenges, future directions perovskite regarding synthesis, spectroscopy, devices, guide currently working area well those that will join field future.

Language: Английский

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Color‐Stable Two‐Dimensional Tin‐Based Perovskite Light‐Emitting Diodes: Passivation Effects of Diphenylphosphine Oxide Derivatives

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(29)

Published: April 25, 2023

Abstract The performance of tin (Sn)‐based perovskite light‐emitting diodes (PeLEDs) lags behind their lead analogs due to the challenges Sn 2+ oxidation, defect passivation, and fast crystallization. Herein, passivation effects diphenylphosphine oxide (DPPO) derivatives on fabrication PEA 2 SnI 4 films are investigated. DPPO with hydroxyl group, or including substituent group potential form unfavorable passivators positive in accelerating oxidation. In comparison, amino‐functionalized molecule is an effective additive enhance photoluminescence as well crystallinity improvement. Based optimized films, color‐stable pure‐red PeLEDs demonstrated a full width at half maximum 23 nm 630 nm, luminance 451 cd m −2 , external quantum efficiency 3.51%, half‐lifetime 13.7 min 102 . This work opens new prospects selection molecular additives for Sn‐based perovskites.

Language: Английский

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Ligand Engineering Enables Efficient Pure Red Tin‐Based Perovskite Light‐Emitting Diodes

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(50)

Published: Oct. 27, 2023

With increasing ecological and environmental concerns, tin (Sn)-based perovskite light-emitting diodes (PeLEDs) are competitive candidates for future displays because of their friendliness, excellent photoelectric properties, low-cost solution-processed fabrication. Nonetheless, electroluminescence (EL) performance still lags behind that lead (Pb)-based PeLEDs due to the fast crystallization rate Sn-based films undesired oxidation from Sn2+ Sn4+ , leading poor film morphology coverage, as well high density defects. Here, we propose a ligand engineering strategy construct high-quality phenethylammonium iodide (PEA2 SnI4 ) by using L-glutathione reduced (GSH) surface ligands toward efficient pure red PEA2 -based PeLEDs. We show hydrogen-bond coordinate interactions between GSH effectively reduce perovskites suppress formation The improved not only uniformity, density, coverage but also exhibit enhanced optical properties stability. Finally, state-of-the-art achieve record external quantum efficiency 9.32 % in field devices. This work demonstrates represents feasible route enhance EL

Language: Английский

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Boosting CsSnI₃‐based near‐infrared perovskite light‐emitting diodes performance via solvent coordination engineering

InfoMat, Journal Year: 2024, Volume and Issue: 6(5)

Published: Feb. 22, 2024

Abstract Due to their unique photoelectric properties, nontoxic tin‐based perovskites are emerging candidates for efficient near‐infrared LEDs. However, the facile oxidation of Sn 2+ and rapid crystallization rate result in suboptimal film quality, leading inferior efficiencies perovskite light‐emitting diodes (Pero‐LEDs). In this study, we investigate influence commonly used solvents on quality CsSnI 3 films. Remarkably, DMSO exhibits a stronger interaction with SnI 2 , forming stable intermediate phase ·3DMSO. This effectively inhibits slows down rate, bringing lower defect state density higher photoluminescence quantum yield prepared Consequently, corresponding Pero‐LEDs achieve maximum external efficiency (EQE) 5.6%, among most Pero‐LEDs. addition, device processes ultra‐low roll‐off high reproducibility. Our research underscores crucial role solvent‐perovskite coordination determining quality. These findings offer valuable guidance screening prepare highly perovskites.

Language: Английский

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The progress and challenges of tin-lead alloyed perovskites: Toward the development of large-scale all-perovskite tandem solar cells

Chem, Journal Year: 2025, Volume and Issue: 11(1), P. 102384 - 102384

Published: Jan. 1, 2025

Language: Английский

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Opportunity of lead-free metal halide perovskites for electroluminescence

The Innovation Materials, Journal Year: 2023, Volume and Issue: 1(1), P. 100015 - 100015

Published: Jan. 1, 2023

<p>Lead halide perovskites (LHPs), which have demonstrated exceptional optical and electrical properties are promising candidates for electroluminescent light-emitting diodes (LEDs). However, concerns about the toxicity stability hindered their commercialization. In recent years, lead-free metal (LFMHPs) emerged as alternatives, significant progress has already been made in developing LFMHP-based LEDs. Nevertheless, device performance is still inferior to that of well-developed LHP-based counterparts. To fully exploit LED applications boost performance, this review, we provide a comprehensive overview currently explored different metal-based LFMHPs. We mainly focus on preparation methods, crystal structure, properties, these materials. Furthermore, conclude with discussion regarding key challenges potential prospects field. hope review will inspire more extensive research LFMHPs from new perspective promote practical LEDs multiple directions current future research.</p>

Language: Английский

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Bi‐Functional Phosphine Oxide Passivator for Efficient Near‐Infrared Sn‐Based Perovskite Light‐Emitting Diodes with Ultra‐Low Efficiency Roll‐Off

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(13)

Published: Dec. 21, 2023

Abstract Recently, lead‐free Sn‐based perovskite light‐emitting diodes (PeLEDs) have attracted wide attention due to their near‐infrared emission and environmental friendliness. However, desired Sn 2+ is easily oxidized 4+ in the crystallization process, resulting defects intrinsically p‐doped properties films. The uncontrollable oxidation affects charge injection balance radiative recombination, leading poor device performance. Herein, a bi‐functional conductive molecular, 2,7‐bis(diphenylphosphoryl)‐9,9′‐spirobifluorene (SPPO13) with two P═O functional groups, used interact passivate suppress of . Moreover, SPPO13 modification layer inserted between emitter electron transport can regulate carrier transport, thus promoting balance. As result, high‐performance CsSnI 3 PeLEDs record external quantum efficiency (EQE) 6.60% ultra‐low roll‐off are achieved. work provides novel approach defect passivation for efficient PeLEDs.

Language: Английский

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Tin-Halide Perovskites for Near-Infrared Light-Emitting Diodes

ACS Energy Letters, Journal Year: 2024, Volume and Issue: 9(6), P. 2500 - 2507

Published: May 10, 2024

Light-emitting diodes (LEDs) with different emission spectra are widely used in daily life for a variety of applications. However, due to fundamental restrictions light-emitting materials, the development near-infrared LEDs (NIR-LEDs) is still modest. Recently, solution-processed tin-halide perovskites (THPs) have emerged as one most promising materials NIR-LED In this Perspective, we start discussing peculiarities THP semiconductors and how their electronic properties affect light efficiency. We then summarize current efforts material engineering design master films. Finally give an outlook on future challenges technical roadmap tin-based perovskite LEDs.

Language: Английский

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Enhancing the Performance of 2D Tin‐Based Pure Red Perovskite Light‐Emitting Diodes through the Synergistic Effect of Natural Antioxidants and Cyclic Molecular Additives

Small, Journal Year: 2024, Volume and Issue: 20(25)

Published: Jan. 10, 2024

Tin (Sn)-based perovskites are being investigated in many optoelectronic applications given their similar valence electron configuration to that of lead-based and the potential environmental hazards perovskites. However, formation high-quality Sn-based perovskite films faces several challenges, mainly due easy oxidation Sn

Language: Английский

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Surface Treatment with Tailored π-Conjugated Fluorene Derivatives Significantly Enhances the Performance of Perovskite Light-Emitting Diodes

ACS Nano, Journal Year: 2024, Volume and Issue: 18(22), P. 14696 - 14707

Published: May 23, 2024

Surface defect passivation and carrier injection regulation have emerged as effective strategies for enhancing the performance of perovskite light-emitting diodes (Pero-LEDs). It usually requires two functional molecules to realize separately. In other words, developing one single molecule possessing these capabilities remains challenging. Herein, we utilized π-conjugated fluorene derivatives surface treatment materials, 9,9-Spirobi[fluorene] (SBF), 9,9-Spirobifluoren-2-yl-diphenylphosphine oxide (SPPO1), 2,7-bis(diphenylphosphoryl)-9,9'-spirobifluorene (SPPO13), investigate influence their chemical structure on device optoelectronic performance, especially regulation. Consequently, capability double-bonded SPPO13 surpassed single-bonded SPPO1 nonbonded SBF, which all showed excellent electron transport properties, injection. The maximum external quantum efficiencies (EQE) Pero-LEDs treated with SPPO1, were 8.13, 17.48, 22.10%, respectively, exceeding that derivative-free (6.55%). Notably, SPPO13-treated devices exhibited exceptional reproducibility, yielding an average EQE 20.00 ± 1.10% based 30 devices. This result emphasizes potential tailored Pero-LEDs.

Language: Английский

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