Triple Interface Passivation Strategy‐Enabled Efficient and Stable Inverted Perovskite Solar Cells

Zuo-ning, Gao; Wang, Yong; Ouyang, Dan; Liu, Hui; Huang, Zhanfeng; Kim, Jin-Wook; Choy, Wallace C. H.

doi:10.1002/smtd.202000478

Cited by 61 publications

(61 citation statements)

References 42 publications

(59 reference statements)

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“…To clarify and examine the defect states and trap recombination at the HTL/perovskite interface, the space-charge limited current model is employed. The trap-state density ( n trap ) can be calculated using the following relationship 56 , where ε, ε 0 , V TFL , e , and L correspondingly represent the relative dielectric constant of perovskite, the dielectric constant of a vacuum, the trap-filling limited voltage, the elementary charge, and the thickness of the perovskite film. The value of V TFL can be derived from the J–V characteristics of reference and sample photodiode devices in a dark condition (Fig.…”

Section: Discussionmentioning

confidence: 99%

Highly efficient self-powered perovskite photodiode with an electron-blocking hole-transport NiOx layer

Afzal

Bae

Aggarwal

et al. 2021

Sci Rep

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Hybrid organic–inorganic perovskite materials provide noteworthy compact systems that could offer ground-breaking architectures for dynamic operations and advanced engineering in high-performance energy-harvesting optoelectronic devices. Here, we demonstrate a highly effective self-powered perovskite-based photodiode with an electron-blocking hole-transport layer (NiOx). A high value of responsivity (R = 360 mA W−1) with good detectivity (D = 2.1 × 1011 Jones) and external quantum efficiency (EQE = 76.5%) is achieved due to the excellent interface quality and suppression of the dark current at zero bias voltage owing to the NiOx layer, providing outcomes one order of magnitude higher than values currently in the literature. Meanwhile, the value of R is progressively increased to 428 mA W−1 with D = 3.6 × 1011 Jones and EQE = 77% at a bias voltage of − 1.0 V. With a diode model, we also attained a high value of the built-in potential with the NiOx layer, which is a direct signature of the improvement of the charge-selecting characteristics of the NiOx layer. We also observed fast rise and decay times of approximately 0.9 and 1.8 ms, respectively, at zero bias voltage. Hence, these astonishing results based on the perovskite active layer together with the charge-selective NiOx layer provide a platform on which to realise high-performance self-powered photodiode as well as energy-harvesting devices in the field of optoelectronics.

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Section: Discussionmentioning

confidence: 99%

Highly efficient self-powered perovskite photodiode with an electron-blocking hole-transport NiOx layer

Afzal

Bae

Aggarwal

et al. 2021

Sci Rep

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“…Another technique is performed by using a triple passivation of the two in-between surfaces of the perovskite and hole transport layer by using inorganic salt of Potassium thiocyanate. This improves both the stability and device performance with a record of 21.23% efficiency [23].…”

Section: Introductionmentioning

confidence: 95%

On the Investigation of Interface Defects of Solar Cells: Lead-Based vs Lead-Free Perovskite

et al. 2021

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Perovskite solar cells (PSCs) have drawn significant consideration as a competing solar cell technology because of the drastic advance in their power conversion efficiency (PCE) over the last two decades. The interfaces between the electron transport layer (ETL) and the absorber layer and between the absorber layer and the hole transport layer (HTL) have a major impact on the performance of the PSCs. In this paper, we have investigated the defect interfaces between ETL/absorber layer and absorber layer/HTL of calibrated experimental lead-based and lead-free PSCs. The influence of the defect interfaces is studied in order to find the optimum value for the maximum possible PCE. While the PCE has not been enhanced considerably for the lead-based, it is boosted from 1.76% to 5.35% for lead-free PSCs. Also, bulk traps were found to have minor role in comparison with interface traps for the lead-free cell while they have a significant impact for the lead-based cell. The results presented in this work would shed some light on designing interface defects of various types of practical PSC structures and demonstrates the crucial impact of the interface defects on lead-free vs lead-based PSCs. All simulation studies are performed by using SCAPS-1D simulator.

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“…25,34,51,[194][195][196][197][198][199] Among them, PCBM was used as ETL in most p-i-n PSC cases. [7][8][9][10]200,201 However, there are some shortcoming for fullerene different electron transport materials (ETMs), such as narrow range of LUMO level, relatively poor morphological stability, and high cost of synthesis and purification. 199 As shown above, some intrinsic weak points exactly exist in organic top ETL.…”

Section: Principles Of Top Etlmentioning

confidence: 99%

“…Known to be a star ETL, fullerene and it derivative such as [6,6]phenyl-C61-butyric acid methyl ester (PCBM) has been widely used in inverted PSCs, exhibiting negligible hysteresis. [6][7][8][9][10] However, difference between the Fermi level of PCBM and the work function of Ag electrode often results in Schottky barrier at their interface, 11 leading to charge carrier recombination and high series resistance (R S ) and thus low PSC performance. To address these issues, inorganic top ETLs have been used due to their advantages such as good optical and electrical properties, low cost, facile synthesis, controllable properties, and so forth.…”

Section: Introductionmentioning

confidence: 99%

Inorganic top electron transport layer for high performance inverted perovskite solar cells

Yang

Peng

Choy

2021

EcoMat

Self Cite

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As promising photovoltaic devices, perovskite solar cells (PSCs) have attracted extensive and ongoing attention due to easy manufacturing and high power conversion efficiency (PCE). Although the PCE is lower than that of PSCs with normal structure, inverted PSCs have been widely investigated due to their lower hysteresis and potential application. Electron transport layer (ETL) on top of perovskite film in inverted PSCs plays a significant role in device performance. Inorganic top ETL has been used to replace organic ETL for their excellent characters. This review summarizes the progress of inorganic top ETL for high-performance inverted PSCs. Firstly, the principles of top ETL and advantages of inorganic ETL are highlighted. Then the established top ETLs are summarized. Subsequently, various strategies for top ETL fabrication are shown to demonstrate their advantages and shortcomings. Finally, conclusion and outlook of top ETL in inverted PSCs are presented, addressing the issues and directing the hopeful solutions.

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Triple Interface Passivation Strategy‐Enabled Efficient and Stable Inverted Perovskite Solar Cells

Abstract: passivation have been successfully developed to improve the PV performance of PSCs. [6-10] In particular, the interface modification between CTLs and the perovskite light absorber layer always plays a pivotal role to improve the performance of PSCs.

Cited by 61 publications

References 42 publications

Highly efficient self-powered perovskite photodiode with an electron-blocking hole-transport NiOx layer

Highly efficient self-powered perovskite photodiode with an electron-blocking hole-transport NiOx layer

On the Investigation of Interface Defects of Solar Cells: Lead-Based vs Lead-Free Perovskite

Inorganic top electron transport layer for high performance inverted perovskite solar cells

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