Improvement of planar perovskite solar cells by using solution processed SnO2/CdS as electron transport layer

Mohamadkhani, Fateme; Javadpour, Sirus; Taghavinia, Nima

doi:10.1016/j.solener.2019.08.067

Cited by 41 publications

(24 citation statements)

References 43 publications

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“…Most of the plots are in the high frequency regions, and the arc is mainly due to the charge transfer process. In agreement with the report, 35 the variation in the charge transfer resistance in the work is related to the different interface of the ETL/perovskite. It is known that the large R rec and small R ct in the solar cell mean less electron− hole recombination.…”

Section: Resultssupporting

confidence: 92%

Increasing Stability of SnO₂-Based Perovskite Solar Cells by Introducing an Anionic Conjugated Polyelectrolyte for Interfacial Adjustment

Tan

Huan

et al. 2021

ACS Appl. Mater. Interfaces

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Despite the fact that power conversion efficiency (PCE) has been greatly improved in recent years, perovskite solar cells (PSCs) need to overcome some challenges, like stability, for the commercial application. Herein, an anionic conjugated polyelectrolyte, sulfonic-containing polyfluorene (abbreviated to SPF), has been developed to modify the interface between the electron-transporting layer (ETL) SnO2 and the optoelectronic active layer MAPbI3 in the n-i-p cells. After 40 days of storage in atmospheric environment in the dark with exposure to a controlled humidity of about 10%, PCE of the SPF-modified cells with the structure of ITO/SnO2/SPF/MAPbI3/spiro-OMeTAD/Au still remained 94% of the initial value. In contrast, the control cell without SPF only remained 31.1% of its initial efficiency after 29 days. The main reason for the stability enhancement is the adjustment of interfacial energy level, the crystallinity enhancement, and the removal of the interfacial defect of the perovskite layer by introducing the hydrophobic and smooth SPF interfacial layer. Deep electrical study on the PSCs discloses that the cell has low carrier transfer resistance, low leakage current density, and minor interfacial charge accumulation. What’s more, the short-circuit current density is improved, and PCE of 20.47% is achieved.

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Section: Resultssupporting

confidence: 92%

Increasing Stability of SnO₂-Based Perovskite Solar Cells by Introducing an Anionic Conjugated Polyelectrolyte for Interfacial Adjustment

Tan

Huan

et al. 2021

ACS Appl. Mater. Interfaces

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“…typically formed by the low temperature chemical water bath deposition (CBD) are compatible with flexible devices; [23] 2) CdS exhibits considerably high electron mobility of 350 cm 2 V À1 S À1 , around two orders of magnitude higher than that of TiO 2 (1 cm 2 V À1 S À1 ); [24] 3) the conduction band (CB) of CdS is close to that of the perovskite layer, beneficial to the increase in open-circuit voltage (V oc ) of solar cells; [25] 4) the relatively low photocatalytic activity of CdS is conducive to improve the stability of perovskite materials under UV light. [20,21] Actually, CdS serves as a classical ETL for conventional CIGS and CdTe thin-film solar cells and affords remarkable photovoltaic performance.…”

mentioning

confidence: 99%

Colloidal SnO₂‐Assisted CdS Electron Transport Layer Enables Efficient Electron Extraction for Planar Perovskite Solar Cells

Zhou

Zhu

et al. 2021

Solar RRL

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Organic-inorganic hybrid perovskite materials have gained remarkable attention in the photovoltaic community due to their superior optical and electrical properties, including high carrier mobility, large light absorption coefficient, tunable bandgap, low trap density, etc. [1][2][3][4] Nowadays, the certified record power conversion efficiency (PCE) of perovskite solar cells (PSCs) has been boosted from 3.8% to 25.5%, [5,6] benefitting from great endeavors focusing on interface engineering, composition modulation, solvent engineering, crystallinity regulation, etc. [7][8][9] As one of extensively used architectures, the typical planar-type PSC comprises transparent conductive substrate, compact electron transport layer (ETL), perovskite absorber layer, hole transport layer (HTL), and metal electrode. [10][11][12] Thereinto, ETL plays a critical role in extracting and transport electrons from perovskite materials to conducting substrate. Hence, it is crucial to design high-quality ETLs with outstanding electron extraction capability for high-performance PSCs. [13,14] It is known that TiO 2 serves as a conventional widely used ETL that delivers PSCs with efficiencies >20%. [15,16] However, the preparation of TiO 2 ETLs usually suffers from high-temperature sintering processes (>450 C); moreover, the low electron mobility and high-density oxygen vacancy trap states of TiO 2 also restrict the further development of TiO 2 -based PSCs. [17,18] Under such circumstances, researchers are dedicated to explore more promising low-temperature processed ETLs for PSCs, such as SnO 2 , CdS, ZnS, SnS 2 , etc. [19][20][21][22] Of these ETLs, CdS shows unique advantages, including: 1) CdS thin films

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“…These merits render the possibility to manufacture highperformance PSCs through the industrial continuous production line. The state-of-the-art PSC typically consists of the perovskite layer sandwiched by electron and hole transport layers [6][7][8] or even much more layers to promote the interfacial charge transfer. [9] Regarding industrial manufacturing, the addition of one layer notably increases the difficulties in designing the production line.…”

Section: Introductionmentioning

confidence: 99%

Ionic Liquid Additive‐Assisted Highly Efficient Electron Transport Layer‐Free Perovskite Solar Cells

et al. 2021

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Perovskite solar cells (PSCs) have achieved unprecedented power conversion efficiency improvements, and further development is stepping to industrialization. In terms of industrial manufacturing, simplifying the solar cell structure is critical in both fabrication process design and cost control. Due to the bipolar charge transport nature of perovskites, the elimination of the charge carrier transport layer is possible. Herein, EMIMPF6 ionic liquid is incorporated into the perovskite film to modulate the energy‐level alignment and the charge transfer kinetics, demonstrating a high‐performance electron transport layer‐free (ETL‐free) PSC. The integrated EMIMPF6 assisted the internal charge collection and favored the interfacial charge transfer from perovskite to FTO substrate, contributing to the high performance of ETL‐free PSCs. The ETL‐free PSCs showed a conversion efficiency of 16.2%, which is comparable with its conventional counterpart. This work provides a solution to simplify the PSC structure and would have an impact on designing a scalable manufacturing process for PSCs.

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Improvement of planar perovskite solar cells by using solution processed SnO2/CdS as electron transport layer

Cited by 41 publications

References 43 publications

Increasing Stability of SnO₂-Based Perovskite Solar Cells by Introducing an Anionic Conjugated Polyelectrolyte for Interfacial Adjustment

Increasing Stability of SnO₂-Based Perovskite Solar Cells by Introducing an Anionic Conjugated Polyelectrolyte for Interfacial Adjustment

Colloidal SnO₂‐Assisted CdS Electron Transport Layer Enables Efficient Electron Extraction for Planar Perovskite Solar Cells

Ionic Liquid Additive‐Assisted Highly Efficient Electron Transport Layer‐Free Perovskite Solar Cells

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Improvement of planar perovskite solar cells by using solution processed SnO2/CdS as electron transport layer

Cited by 41 publications

References 43 publications

Increasing Stability of SnO2-Based Perovskite Solar Cells by Introducing an Anionic Conjugated Polyelectrolyte for Interfacial Adjustment

Increasing Stability of SnO2-Based Perovskite Solar Cells by Introducing an Anionic Conjugated Polyelectrolyte for Interfacial Adjustment

Colloidal SnO2‐Assisted CdS Electron Transport Layer Enables Efficient Electron Extraction for Planar Perovskite Solar Cells

Ionic Liquid Additive‐Assisted Highly Efficient Electron Transport Layer‐Free Perovskite Solar Cells

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Increasing Stability of SnO₂-Based Perovskite Solar Cells by Introducing an Anionic Conjugated Polyelectrolyte for Interfacial Adjustment

Increasing Stability of SnO₂-Based Perovskite Solar Cells by Introducing an Anionic Conjugated Polyelectrolyte for Interfacial Adjustment

Colloidal SnO₂‐Assisted CdS Electron Transport Layer Enables Efficient Electron Extraction for Planar Perovskite Solar Cells