Inverted CH3NH3PbI3 perovskite solar cells based on solution-processed V2O5 film combined with P3CT salt as hole transport layer

Duan, Chenghao; Zhao, Min; Zhao, Chengjie; Wang, Yao; Li, Jiang-Sheng; Han, Wei; Hu, Quanqin; Yao, Lili; Jian, Hongmei; Lu, Fushen; Jiu, Tonggang

doi:10.1016/j.mtener.2018.07.004

Cited by 27 publications

(13 citation statements)

References 43 publications

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“…This is beneficial to the spreading of the precursor solution of perovskite active layer with DMF as solvent on these substrates, so as to obtain high‐quality perovskite films. [ 42 ]…”

Section: Resultsmentioning

confidence: 99%

PEDOT:PSS‐Metal Oxide Composite Electrode with Regulated Wettability and Work Function for High‐Performance Inverted Perovskite Solar Cells

Duan

Liu

Yuan

et al. 2020

Advanced Optical Materials

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Poly(3,4‐ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) can be roll‐to‐roll deposited on the substrate facilely in the electronics, but its acidity and mismatched energy level limit the performance and stability. Herein, different metal salts are incorporated into PEDOT:PSS solution to prepare PEDOT:PSS‐AxOy (metal oxide) composite hole transport layer and it is found that the performance of inverted perovskite solar cells (PSCs) can be greatly enhanced. PSC using PEDOT:PSS‐MoOx has achieved much higher power conversion efficiency (PCE) (19.64%) than that of pristine PEDOT:PSS (12.19%). Two key factors are important for the performance enhancement. First, the increased surface free energy of PEDOT:PSS‐AxOy is beneficial for the formation of large crystal size and pinhole‐free film, leading to reduced nonradiative recombination. Second, the work function of PEDOT:PSS can be tuned to match the energy level of photoactive layer with small amount incorporation, which greatly enhances the photovoltage by a factor of 1.1. Besides, the devices based on PEDOT:PSS‐AxOy exhibit improved long‐term stability. Unencapsulated PSCs with PEDOT:PSS‐MoOx retain over 90% and 80% of their initial PCEs in N2 for 45 d and in ambient air for 20 d, respectively. The modified PEDOT:PSS solutions overcome the intrinsic imperfection and can be potentially employed for large‐scale production in the electronic devices.

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“…This is beneficial to the spreading of the precursor solution of perovskite active layer with DMF as solvent on these substrates, so as to obtain high‐quality perovskite films. [ 42 ]…”

Section: Resultsmentioning

confidence: 99%

PEDOT:PSS‐Metal Oxide Composite Electrode with Regulated Wettability and Work Function for High‐Performance Inverted Perovskite Solar Cells

Duan

Liu

Yuan

et al. 2020

Advanced Optical Materials

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“…VO x HTL retains 65.7% of the initial PCE after aging for 500 h in the ambient environment (RH: ≈25%) without encapsulation. Jiu and co‐workers developed a facile solution method to prepare a V 2 O 5 film combined with P3CT‐K that form a bilayer structure as hole‐transporting layers in inverted CH 3 NH 3 PbI 3 solar cells . The device based on bilayer HTL exhibited a higher PCE of 19.7%.…”

Section: Influence Of Charge Transport Layer On Stabilitymentioning

confidence: 99%

A Review of Perovskites Solar Cell Stability

Wang

Mujahid

Duan

et al. 2019

Adv Funct Materials

959

849

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the perovskite material onto transparent substrates covered with a compact TiO 2 layer and an optional mesoporous TiO 2 (or Al 2 O 3 ) scaffold layer. [34] The p-i-n structure, which involves depositing the perovskite material onto transparent substrates which are covered with an HTL, such as the poly(3,4-ethylene dioxythiophene):polystyrene sulfonic acid (PEDOT:PSS). [35] So far, PSCs based on both mesoporous and planar structure exhibit high performance and stability, however, the comparison of the advantages of two different strucutres in stability is still under debate. [36] Mesoporous Perovskite Solar CellsRecently, a new generation of photovoltaic converters, mesoporous solar cell [37] has attracted more consideration due to their low material cost, simple fabrication process, high energy conversion efficiencies, [38] like dye-sensitized solar cell, [38c] and mesoporous perovskite solar cell. [5a,21,39] PCE up to 9.7% has been achieved by using CH 3 NH 3 PbI 3 (MAPbI 3 ) perovskite nanocrystals as the light absorber to fabricate a solid-state MPSC. [21] After that the research focuses on solid-state MSCs began to transfer from DSSCs to MPSCs. [32a,40] In an MPSC, a compact layer is usually deposited on fluorine doped tin oxide (FTO) layer, which usually extracts electrons and block holes. Three strategies are broadly used for depositing the TiO 2 layer: 1) Spin-coating the colloidal dispersion of TiO 2 nanoparticles followed by a thermal treatment (titanium source: TiCl 4 , [41] titanium isopropoxide, [42] tetra-n-butyl-titanate; [43] 2) spin-coating titanium precursor solutions followed by a thermal treatment (titanium source: TiCl 4 , [44] titanium isopropoxide, [23] titanium diisopropoxide bis(acetylacetonate) 12 ); 3) spray pyrolysis deposition (titanium source: titanium diisopropoxide bis(acetylaceto nate) 18 ). [45] Low-temperature sintering approaches to prepare an

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“…The smaller angle represents higher DMSO-wettability of substrates, facilitating the formation of compact and uniform perovskite film. [50,51] Furthermore, the top-view scanning electron microscope (SEM) and AFM images of perovskite films deposited on PEDOT:PSS and SBS-x-PEDOT: PSS film are shown in Figure 2 and S5, Supporting Information. All the perovskite layers spin-coated on different HTLs fully cover the substrates without pinholes.…”

Section: Resultsmentioning

confidence: 99%

Sodium Benzenesulfonate Modified Poly (3,4‐Ethylenedioxythiophene):Polystyrene Sulfonate with Improved Wettability and Work Function for Efficient and Stable Perovskite Solar Cells

Wang

et al. 2020

Solar RRL

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The increasing interest in high-performance and economical photovoltaic materials has heightened the emergency to develop the organic-inorganic hybrid halide perovskite solar cells (PSCs). Since the debut of PSCs proposed by Miyasaka et al. in 2009, the PSCs community has achieved great success such as the rocketing power conversion efficiency (PCE) from the initial 3.8% to the latest 25.5% in 2020 in single-junction architectures, and to 29.1% in silicon-based tandem cells. [1-5] This eye-catching breakthrough is contributed by the numerous merits of perovskite material such as long carrier-diffusion length, proper bandgap (1.5-1.6 eV), and facile solution processing. [6-10] In general, the PSCs are classified by architecture into normal (n-i-p) and inverted (p-in) structures, where the perovskite layer is sandwiched between the electron transport layer (ETL) and hole transport layer (HTL). [11,12] For the normal-structured PSCs, metal oxides such as SnO 2 and TiO 2 are commonly used as the bottom ETL, whereas the organic materials such as Spiro-OMeTAD are used as HTL. [13,14] The PSCs feature high efficiency up to 24.82% by introducing fluorinated isomeric analogs in Spiro-OMeTAD. [15] However, the normal-structured PSCs with high PCE are usually based on mesoscopic n-type TiO 2 or insulating Al 2 O 3 to accelerate electron mobility, while the high sintering temperature (>450 C) limits the application in low-cost flexible devices. [16,17] Meanwhile, the upper HTL used organic materials is extremely costly and unstable in air. In contrast, the bottom HTL of inverted (p-in) PSCs is low-temperature processable (<100 C) and cheaper. Therefore, the inverted planar PSCs have a wider application prospect on account of lowtemperature preparation, excellent reproducibility, and negligible hysteresis. [18,19] In addition, the efficiency of the small-area inverted planar PSCs has reached a certified value of 22.3%. [20] Also the record efficiency of over 18% for a mini-module has been achieved in an aperture area of 19.276 cm 2. [21] These results indicate that the inverted structure may be more suitable for manufacturing large-area cells with long-term stability and outstanding efficiency, which means inverted planar PSCs have a better prospect in commercialization. The most common structure of the inverted PSCs is indium tin oxide (ITO)/Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS)/perovskite/PCBM/metal electrode. [22,23] PEDOT:PSS is the most extensively used hole transfer material in inverted PSCs due to its optical transparency, high thermal stability, and good mechanical flexibility.

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Inverted CH3NH3PbI3 perovskite solar cells based on solution-processed V2O5 film combined with P3CT salt as hole transport layer

Cited by 27 publications

References 43 publications

PEDOT:PSS‐Metal Oxide Composite Electrode with Regulated Wettability and Work Function for High‐Performance Inverted Perovskite Solar Cells

PEDOT:PSS‐Metal Oxide Composite Electrode with Regulated Wettability and Work Function for High‐Performance Inverted Perovskite Solar Cells

A Review of Perovskites Solar Cell Stability

Sodium Benzenesulfonate Modified Poly (3,4‐Ethylenedioxythiophene):Polystyrene Sulfonate with Improved Wettability and Work Function for Efficient and Stable Perovskite Solar Cells

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