Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture

Hu, Long; Zhao, Qian; Huang, Shujuan; Zheng, Jianghui; Guan, Xinwei; Patterson, Robert; Kim, Jiyun; Shi, Lei; Lin, Chun‐Ho; Lei, Qi; Chu, Dewei; Wan, Tao; Cheong, Soshan; Tilley, Richard D.; Ho‐Baillie, Anita; Luther, Joseph M.; Yuan, Jianyu; Wu, Tom

doi:10.1038/s41467-020-20749-1

Cited by 192 publications

(198 citation statements)

References 58 publications

(32 reference statements)

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“…[ 23–25 ] Concurrently, CsPbX 3 (X = Cl − , Br − , I − , or mixed‐halide) QDs with all‐inorganic crystal structures have emerged as a rising star for optoelectronic applications because of their stronger flexibility in adjusting the composition, optical and electrical properties, high photoluminescence quantum yields (PLQYs) due to impressive defect tolerance. Advances in CsPbI 3 QD solar cells have enabled high efficiency over 14%, [ 26–31 ] showing great potential for QD PVs. Although previous studies have demonstrated the promise of HSCs, none has demonstrated high PCEs over 15% in these hybrid devices, probably due to insufficient charge transfer and carrier extraction efficiencies at QD/organic hybrid heterointerfaces.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Perovskite Quantum Dot/Non‐Fullerene Molecule Solar Cells with Efficiency Over 15%

Yuan¹,

Zhang²,

Sun³

et al. 2021

Adv Funct Materials

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Organic‐inorganic hybrid film using conjugated materials and quantum dots (QDs) are of great interest for solution‐processed optoelectronic devices, including photovoltaics (PVs). However, it is still challenging to fabricate conductive hybrid films to maximize their PV performance. Herein, for the first time, superior PV performance of hybrid solar cells consisting of CsPbI3 perovskite QDs and Y6 series non‐fullerene molecules is demonstrated and further highlights their importance on hybrid device design. In specific, a hybrid active layer is developed using CsPbI3 QDs and non‐fullerene molecules, enabling a type‐II energy alignment for efficient charge transfer and extraction. Additionally, the non‐fullerene molecules can well passivate the QDs, reducing surface defects and energetic disorder. The champion CsPbI3 QD/Y6‐F hybrid device has a record‐high efficiency of 15.05% for QD/organic hybrid PV devices, paving a new way to construct solution‐processable hybrid film for efficient optoelectronic devices.

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Section: Introductionmentioning

confidence: 99%

Hybrid Perovskite Quantum Dot/Non‐Fullerene Molecule Solar Cells with Efficiency Over 15%

Yuan¹,

Zhang²,

Sun³

et al. 2021

Adv Funct Materials

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Section: Pqd Solar Cell Architecturesmentioning

confidence: 99%

Perovskite Quantum Dot Solar Cells: An Overview of the Current Advances and Future Perspectives

et al. 2021

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Perovskite quantum dots (PQDs) have revolutionized the field of perovskite solar cells in recent years. Using PQDs improves the operational stability of these devices, which is one of their main drawbacks for applications. This factor has motivated an intense search for new advances, from a fundamental aspect to improved performance in devices. Therefore, the developments obtained for PQD solar cells are discussed, presenting the challenges already overcome and the upcoming tendencies for research. Thus, the fundamental aspects of halide perovskite structures are first introduced. The advantages of their preparation as quantum dots are presented as well. The advances for post‐treatments (purification, passivation, and ligand exchange) are then discussed. Next, an in‐depth discussion of the PQD solar cell architectures is made, highlighting both the obsolete configurations and upcoming tendencies. A more specific view of the PQD compositions is then made, including lead‐free compositions and strategies for ionic substitution. Links of the photovoltaic performance are constructed with the devices’ architecture, post‐treatments, and perovskite composition, providing a wide‐ranging overview of these parameters for the devices’ efficiencies. Finally, the authors’ point of view about the future of PQD solar cell technology is presented, showing the main drawbacks, advantages, and opportunities for research.

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“…Lead halide perovskites have attracted considerable attention owing to their excellent characteristics such as solution processability, tunable bandgap, high charge carrier mobilities and high emission color purity [1][2][3][4][5][6][7][8][9][10][11][12]. They present promising potential in perovskite solar cells (PSCs) and light-emitting diodes (LEDs) over the past decade [13][14][15][16][17][18][19][20][21][22][23][24][25]. Currently, PSCs have reached power conversion efficiencies of over 25% in single-junction devices and the external quantum efficiencies (EQEs) of perovskite light-emitting diodes (PeLEDs) have reached more than 20%, being close to the state-of-the-art organic LEDs (OLEDs) [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Effects of organic ligands on efficiency and stability of perovskite light-emitting diodes

Zhang

Zhu

et al. 2021

J Mater Sci

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Perovskite light-emitting diodes (PeLEDs) have attracted considerable attention due to their low cost, high efficiency and narrowband emission. However, poor operational lifetime limits their practical application and the degradation mechanism is not yet clear. Herein, the effect of typical phenylalkylamine and alkylamine ligands on optoelectrical properties and operational stability of cesium/methylammonium lead bromide PeLEDs were systematically investigated. The phenylethylamine (PEA) modified PeLED shows a champion maximum external quantum efficiency (EQE) of 9.35%, which is much better than that of phenylmethylamine (PMA) and phenylbutylamine (PBA) modified devices. For alkylamine-based devices, the maximum EQEs gradually rise from 2.72 to 6.33% and 6.66% as increase of alkyl chain length. PEA modified device exhibits the best half-lifetime of 114 min and alkylamine-based devices exhibit almost equal T 50 of approximately 20 min. X-ray diffraction measurements show that the dominant diffraction peaks of pervoskite films disappear or shift and scanning electron microscope detected that many pinholes appeared in perovskite films after operation. Combining with the results of X-ray photoelectron spectroscopy, we conclude that the recrystallization of perovskite occurred during the operation causes the film change in morphology and crystallinity, ultimately result in the degradation of PeLEDs.

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Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture

Cited by 192 publications

References 58 publications

Hybrid Perovskite Quantum Dot/Non‐Fullerene Molecule Solar Cells with Efficiency Over 15%

Hybrid Perovskite Quantum Dot/Non‐Fullerene Molecule Solar Cells with Efficiency Over 15%

Perovskite Quantum Dot Solar Cells: An Overview of the Current Advances and Future Perspectives

Effects of organic ligands on efficiency and stability of perovskite light-emitting diodes

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