PEOz-PEDOT:PSS Composite Layer: A Route to Suppressed Hysteresis and Enhanced Open-Circuit Voltage in a Planar Perovskite Solar Cell

Huang, Di; Goh, Taedong; McMillon‐Brown, Lyndsey; Kong, Jaemin; Zheng, Yifan; Zhao, Jiao; Li, Yang; Zhao, Suling; Xu, Zheng; Taylor, André D.

doi:10.1021/acsami.8b05949

Cited by 19 publications

(24 citation statements)

References 41 publications

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“…The XPS S 2p spectra of unmodified and modified PEDOT:PSS films are shown in Figure 2a,b. The two strong peaks between 167.0 and 170 eV are observed in both samples, which are attributed to the spin-split components of sulfur atoms in the PSS chains, [33] and between 163.9 and 165.6 eV, [8,[45][46][47][48][49][50][51][52][53][54][55] and in this work. two small peaks for both spectra are observed, which are assigned to the sulfur atoms of the PEDOT fragments.…”

Section: Resultsmentioning

confidence: 65%

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Poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) Modified by Water for Efficient Inverted Perovskite Solar Cells

Xiong

Zhao

Liu

et al. 2021

Physica Status Solidi (a)

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Poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) (PEDOT:PSS) is a popular hole transport material in inverted perovskite solar cells (PSCs). However, it is required to modify the PEDOT:PSS to achieve high-performance PSCs. Herein, a facile method to modify PEDOT:PSS using water to improve the performance of inverted PSCs is developed. The modification impact on the physical properties of the PEDOT:PSS films is systemically studied. The results show that the transmittance and resistance of the PEDOT:PSS layer are greatly improved by modification using water without changing its work function. The growth of perovskite films on PEDOT:PSS is also influenced by the modification of PEDOT:PSS using water. Better crystallinity and larger grain sizes of the perovskite film are also achieved, leading to recombination loss being greatly reduced and the performance of the devices significantly improved. The PSCs based on modified PEDOT:PSS exhibit a higher power conversion efficiency (PCE) of 17.28 % and higher open-circuit voltage (V oc ) of 1.06 V compared to control devices prepared with unmodified PEDOT:PSS (PCE ¼ 12.49%, V oc ¼ 0.99 V). This work provides a facile method to modify PEDOT:PSS to prepare high-performance inverted PSCs.

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Section: Resultsmentioning

confidence: 65%

“…e) The J-V curves and performance parameters of the PSCs based on modified PEDOT:PSS with different scan directions. f ) A plot of PCEs of inverted PSCs based on PEDOT:PSS HTL in the literature[8,[45][46][47][48][49][50][51][52][53][54][55] and in this work.…”

mentioning

confidence: 99%

Poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) Modified by Water for Efficient Inverted Perovskite Solar Cells

Xiong

Zhao

Liu

et al. 2021

Physica Status Solidi (a)

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“…The calculated hysteresis indexes ((PCE RSÀ PCE FS )/PCE RS ) are 1.09% and 0.53% for PEDOT:PSS and SBS-9-PEDOT:PSS-based PSCs, [59] where the decreased hysteresis might be derived from the well-matched energy band alignment and fewer grain boundaries. [60][61][62] The long-term stability of unencapsulated PSCs storing in ambient condition are presented in Figure 4f. It is clear that the stability of SBS-9 based PSC has tremendously increased.…”

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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“…The crystallization and film morphology of perovskite will be significantly affected by the underlying CTL, which considerably affect the film quality and highly relate to the PVSC performance. [11,14,29,59,60,[68][69][70][71] The CTL properties, e.g., work function, mobility, morphology, and defect, are of critical importance for high-performance PVSCs. Emerging efforts have been carried out to investigate CTL materials for efficient collection of the photogenerated charge carriers.…”

Section: Carrier Transporting Layers In Perovskite Solar Cellsmentioning

confidence: 99%

“…For the organic materials, 2,2′,7,7′-tetrakis(N,Nd i -p -m e t h o x y p h e n y l -a m i n e ) 9 , 9 ′spirobifluorene (Spiro-OMeTAD), poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), and poly (triarylamine) (PTAA) are typically used to transport holes. [5][6][7][8][9][10][11][12][13][14][15][16][17] The fullerene based materials and their derivatives are also intensively studied as electron transport materials, such as the phenyl-C 61 -butyric acid methyl ester (PCBM), C 60 bathocuprione (BCP), etc. Meanwhile, the relatively low-cost nonfullerenes, e.g., 3,9-bis(2-methylene-and their derivatives that possess excellent optical and electrical properties compared with their fullerene counterparts are also promising for highly efficient and stable PVSCs.…”

mentioning

confidence: 99%

Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

Ren

Wang

Choy

2019

Advanced Optical Materials

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strategies for efficiency improvement. [3,4] Currently, it is found that the film quality of the perovskites synthesized by the newly developed approaches is capable of producing an absorption layer delivering the PCE of over 20%. The engineering of the interfacial properties has become a critical issue for the material scientists, engineers, and physicists. The further improvement of PCE requires multidisciplinary collaborative investigations. There are recent reports on the modifications of the commonly used carrier transport materials including the organic materials, inorganic materials, nanocomposites, etc. For the organic materials, 2,2′,7,7′-tetrakis(N,Nd i -p -m e t h o x y p h e n y l -a m i n e ) 9 , 9 ′spirobifluorene (Spiro-OMeTAD), poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), and poly (triarylamine) (PTAA) are typically used to transport holes. [5][6][7][8][9][10][11][12][13][14][15][16][17] The fullerene based materials and their derivatives are also intensively studied as electron transport materials, such as the phenyl-C 61 -butyric acid methyl ester (PCBM), C 60 bathocuprione (BCP), etc. Meanwhile, the relatively low-cost nonfullerenes, e.g., 3,9-bis(2-methylene-(3-(1,1-dicyanomethylene)-indanone))-5,5,11,11-tetrakis(4hexylphenyl)-dithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′] dithiophene) (ITIC) and their derivatives that possess excellent optical and electrical properties compared with their fullerene counterparts are also promising for highly efficient and stable PVSCs. [18][19][20][21][22][23][24][25][26][27][28][29] Regarding the inorganic semiconductor materials, metal oxides possess superior stability and tunable optical and electrical properties compared with the organic semiconductor materials. The various metal oxides such as titanium dioxide (TiO 2 ), [13,[30][31][32][33][34][35][36][37][38] zinc oxide (ZnO), [39,40,38,19,41] and tin oxide (SnO 2 ) [42][43][44][45][46][47][48][49] are commonly used as the electron transport layer (ETL), while nickel oxide (NiO x ), [50][51][52][53] copper oxide (Cu 2 O), [54,55] copper (I) thiocyanate (CuSCN), [16,56,57] copper gallium oxide (CuGaO 2 ), [58] and nickel cobalt oxide (NiCoO x ) [12,59] serve as the hole transport layer (HTL) in the PVSCs. [60,61] Meanwhile, several theoretical studies based on different approaches to the device models have also been reported, focusing on the underlying physics of the efficiency loss, [62] hysteresis phenomena, [63][64][65][66] etc., which are substantially affected by the carrier transport layer (CTL) properties. These models enable the analysis of the device performance from the macroscopic circuit aspect [67] to the microscopic carrier level, [65] which offer a comprehensive understanding of the device physics of CTLs in PVSCs.Perovskite solar cells (PVSCs) have emerged as a promising candidate for addressing the energy crisis due to their rapid efficiency improvement up to 24.2% within 10 years. The defects existing in perovskite film have been found to be as low as 10 15 cm ...

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PEOz-PEDOT:PSS Composite Layer: A Route to Suppressed Hysteresis and Enhanced Open-Circuit Voltage in a Planar Perovskite Solar Cell

Cited by 19 publications

References 41 publications

Poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) Modified by Water for Efficient Inverted Perovskite Solar Cells

Poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) Modified by Water for Efficient Inverted Perovskite Solar Cells

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

Device Physics of the Carrier Transporting Layer in Planar Perovskite Solar Cells

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