Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent

Lin, Kebin; Xing, Jun; Quan, Li Na; Arquer, F. Pelayo Garcı́a de; Gong, Xiwen; Lu, Jianxun; Xie, Liqiang; Zhao, Wenguang; Zhang, Di; Yan, Chuanzhong; Li, Wenqiang; Liu, Xinyi; Lu, Yan; Kirman, Jeffrey; Sargent, Edward H.; Xiong, Qihua; Wei, Zhanhua

doi:10.1038/s41586-018-0575-3

Cited by 2,694 publications

(2,337 citation statements)

References 28 publications

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“…Recently, the external quantum efficiency (EQE) of red and green perovskite LEDs has risen to over 20%. Unfortunately, research on blue perovskite LEDs has lagged behind, with the first blue MHP quantum dot‐based light‐emitting diodes (QLEDs) reported in 2015 .…”

Section: Introductionmentioning

confidence: 99%

Recent advances and prospects toward blue perovskite materials and light‐emitting diodes

Fang

Zhang

Yuan

et al. 2019

InfoMat

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Perovskite based light‐emitting diodes (PeLEDs) have become a powerful candidate for next‐generation solid‐state lightings and high‐definition displays due to their high photoluminescence quantum yield (PLQY), tunable emission wavelength over the visible spectrum, and narrow emission linewidths. Over the past few years, the development of red‐ and green‐emissive PeLEDs has rapidly increased, and the corresponding external quantum efficiencies (EQE) have exceeded 20%. However, the research progress of blue‐emitting PeLEDs is limited by its poor material quality and inappropriate device structure. Currently, the maximum EQE of blue PeLED is only 6.2%, which is far from the industrialization requirements. In order to promote the development of blue PeLEDs, we summarize the recent research progress of blue perovskite materials and LEDs and discuss several fatal challenges, mainly embodied in low efficiency and poor stability. In order to overcome these challenges, detailed analysis and strategies are put forward in terms of the materials and devices. For the former, we summarize the feasible strategy for the preparation of efficient and stable blue‐emissive perovskites using component engineering. For the latter, we analyze the advantages and limitations of the different strategies for blue‐emissive perovskite in LEDs. At the end of the review, a comprehensive outlook is detailed, including future development directions and several technical problems to be solved. Thus, we aim to highlight the significance and promote the industrialization of PeLEDs.

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Section: Introductionmentioning

confidence: 99%

Recent advances and prospects toward blue perovskite materials and light‐emitting diodes

Fang

Zhang

Yuan

et al. 2019

InfoMat

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“…[21][22][23][24][25][26][27] Perovskite materials are low cost, and their reasonable ionization energy is comparable to that of conventional hole-injection materials for LEDs. [18,[28][29][30][31] According to the latest reports, [32,33] the external quantum efficiency (EQE) of perovskite LEDs surpassed 20%. In addition, a lot of attention focused on conventional LED materials has switched to the perovskites owing to their sharp band edges, outstanding PL properties, and bright electroluminescence (EL) at room temperature.…”

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confidence: 99%

Dimensionally Engineered Perovskite Heterostructure for Photovoltaic and Optoelectronic Applications

Heo

Seo

Cho

et al. 2019

Advanced Energy Materials

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Organometal halide perovskites are emerging materials for photovoltaics and light emitting diodes. The latest power-conversion efficiency of perovskite solar cells is 24.2%, and the light-emitting diode efficiency has exceeded 21%. Since the structure of the solar cell and light-emitting diode (LED) is different from each other, the integration of their structures into Although 2D|3D has shown potential for application in multifunctional devices, the principle of operation for multifunction devices (SOLAR Cell-LED: SOLED) has not yet been revealed. However, most studies have reported that the devices have only one auspicious characteristic. Here in this study the SOLED devices are monitored and investigated in a 2D|3D heterostructure with a multidimensional perovskite. It is fond that a 2D|3D heterostructure with a multidimensional perovskite interface induces carrier transmission from the interface, increasing the density of electrons and holes, and increasing their recombination. An interface-engineered perovskite 2D|3D-heterojunction structure is employed to realize the multifunctional photonic device in on-chip, exhibiting overall power conversion efficiencies of photovoltaics up to 21.02% under AM1.5, and external quantum efficiency of the light-emitting diode up to 5.13%. This novel phenomenon is attributed to carrier transfer resulting in a high carrier density and enhanced carrier recombination at the 2D|3D interface.on-chip device architecture enhances one performance but deteriorates the other, and vice versa. Here, we employed an interface-engineered perovskite 2D|3Dheterojunction structure to realize the multifunctional photonic device in onchip, exhibiting power conversion efficiencies of photovoltaics up to 21.02% under AM1.5, and external quantum efficiency of the light emitting diode up to 5.13%. This novel phenomenon is attributed to carrier transfer resulting in a high carrier density and enhanced carrier recombination at the 2D|3D interface. As the demand for research on a variety of optoelectronic applications increases, the dual function of converting solar cells, detectors, light-emitting diodes, transistors, etc., into various forms of energy and signals and producing reverse energy and signals has become attractive. Especially, organic lead halide perovskites which were introduced initially as a light-absorbing layer of photovoltaics in 2009, [1] have been disruptive to the photovoltaics and their latest power conversion efficiency reaching 24.2%. [2] Efficient free charge generation, [3][4][5][6] long carrier lifetime, [7,8] and long transport length [9] of perovskites endowed their solar cells the exceptional performance. Furthermore, the tunability of the optical and electrical

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“…The highest EQE values of perovskite LEDs are still behind the performance of organic LEDs (OLEDs) and inorganic QD LEDs . Recently, perovskite LEDs with high performances that surpass the milestone value of 20% EQE were reported . This achievement shows that the research about perovskite LEDs and their performances is promising for the future.…”

Section: Led Device Design and Performancementioning

confidence: 99%

Monochromatic LEDs based on perovskite quantum dots: Opportunities and challenges

et al. 2019

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Perovskite quantum dots (QDs) are emerging as one of the most promising candidates for the monochromatic light‐emitting diodes (LEDs) approaching the Rec. 2020 color gamut due to their extremely narrow emission bandwidth. Another important aspect are the high photoluminescence quantum yield (PLQY) values that can be obtained either in solution or thin films making these materials as promising candidates for optoelectronic applications such as LEDs or solar cells. Considerable research efforts in chemistry, chemical engineering, solid‐state physics, and material sciences have been made in the past years. The new opportunity in the field of semiconductor quantum dots is still in the beginning phase and is expected to remain active in the following years. Here, in this invited commentary, we briefly discuss and summarize the opportunities and challenges in both fundamental and technological aspects, based on our work and the recent work in this field.

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Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent

Cited by 2,694 publications

References 28 publications

Recent advances and prospects toward blue perovskite materials and light‐emitting diodes

Recent advances and prospects toward blue perovskite materials and light‐emitting diodes

Dimensionally Engineered Perovskite Heterostructure for Photovoltaic and Optoelectronic Applications

Monochromatic LEDs based on perovskite quantum dots: Opportunities and challenges

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