Optical properties and conductivity of PEDOT:PSS films treated by polyethylenimine solution for organic solar cells

Li, Zaifang; Qin, Fei; Liu, Tiefeng; Ge, Ru; Meng, Wei; Tong, Jinhui; Xiong, Sixing; Zhou, Yinhua

doi:10.1016/j.orgel.2015.03.010

Cited by 72 publications

(54 citation statements)

References 33 publications

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“…Compared to reference devices, the all‐solution‐processed devices showed similar V OC , confirming the effective hole extraction of solution‐processed H x MoO 3 . The main difference is from the J SC , which is due to the strong absorption of PEDOT:PSS electrode in the long‐wavelength region (over 550 nm) that reduces the light absorption of active layer to harvest the second pass 40. External quantum efficiency (EQE) for the reference and all‐solution‐processed devices is shown in Figure S6, Supporting Information.…”

Section: Figurementioning

confidence: 99%

Flexible All‐Solution‐Processed Organic Solar Cells with High‐Performance Nonfullerene Active Layers

et al. 2020

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All‐solution‐processed organic solar cells (from the bottom substrate to the top electrode) are highly desirable for low‐cost and ubiquitous applications. However, it is still challenging to fabricate efficient all‐solution‐processed organic solar cells with a high‐performance nonfullerene (NF) active layer. Issues of charge extraction and wetting are persistent at the interface between the nonfullerene active layer and the printable top electrode (PEDOT:PSS). In this work, efficient all‐solution‐processed NF organic solar cells (from the bottom substrate to the top electrode) are reported via the adoption of a layer of hydrogen molybdenum bronze (HXMoO3) between the active layer and the PEDOT:PSS. The dual functions of HXMoO3 include: 1) its deep Fermi level of −5.44 eV can effectively extract holes from the active layer; and 2) the wetting issues of the PEDOT:PSS on the hydrophobic surface of the NF active layer can be solved. Importantly, fine control of the HXMoO3 composition during the synthesis is critical in obtaining processing orthogonality between HXMoO3 and the PEDOT:PSS. Flexible all‐solution‐processed NF organic solar cells with power conversion efficiencies of 11.9% and 10.3% are obtained for solar cells with an area of 0.04 and 1 cm2, respectively.

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Section: Figurementioning

confidence: 99%

Flexible All‐Solution‐Processed Organic Solar Cells with High‐Performance Nonfullerene Active Layers

et al. 2020

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“…[ 7–14 ] Though the PCE had increased remarkably on rigid glass substrates, development of OSCs on flexible substrates particularly for flexible ST‐OSCs still lagged behind. [ 15–18 ] To date, the highest reported PCE for flexible ST‐OSCs with average visible light transmittance (AVT) of over 20% was just over 10%. [ 19 ] Greater attentions should be focused on the development of flexible ST‐OSCs due to its promising potentials as power‐generating windows/roofs in building‐integrated photovoltaics and photovoltaic vehicles.…”

Section: Figurementioning

confidence: 99%

Foldable Semitransparent Organic Solar Cells for Photovoltaic and Photosynthesis

Song

Fanady

Peng

et al. 2020

Advanced Energy Materials

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solution-processability, and lightweight property. [1][2][3][4][5][6] Recently, the power conversion efficiency (PCE) of a single-junction device based on binary photoactive layer system had surpassed the 15-16% boundaries for opaque OSCs and 11-12% boundaries for semitransparent OSCs (ST-OSCs), all of which were fabricated on rigid glass substrates. [7][8][9][10][11][12][13][14] Though the PCE had increased remarkably on rigid glass substrates, development of OSCs on flexible substrates particularly for flexible ST-OSCs still lagged behind. [15][16][17][18] To date, the highest reported PCE for flexible ST-OSCs with average visible light transmittance (AVT) of over 20% was just over 10%. [19] Greater attentions should be focused on the development of flexible ST-OSCs due to its promising potentials as power-generating windows/roofs in building-integrated photovoltaics and photovoltaic vehicles. Additionally, one needs to consider the foldability properties of flexible ST-OSCs if advanced applications in 3D curved surfaces (e.g., future foldable roofs in multifunctional selfpowered greenhouse) are to be realized. This situation drove the current works for foldable-flexible ST-OSCs (hereafter referred to as FST-OSCs).Over the years, studies on ST-OSCs and/or FST-OSCs have centered around materials design of the photoactive layer (design of novel donor/acceptor). [6,20,21] Generally, photo active layer is designed to readily absorb solar irradiation in the nearinfrared (NIR) to infrared (IR) region while being partially transparent in the visible light region. These IR-absorbing photoactive layers are particularly favorable for agricultural applications (e.g., common greenhouse) as sunlight in the visible light region can be predominantly transmitted for plants growth. In fact, solar irradiation located in the visible light region (370-740 nm) is mostly responsible for photosynthesis processes in plants for growth. [22] Through this, ST-OSCs and/ or FST-OSCs for photovoltaic and photosynthesis can be realized, proving the future potential of semitransparent devices as windows/roofs in multifunctional self-powered greenhouse.FST-OSCs have several key parameters similar to its rigid counterparts, such as efficiency, transparency, color, and color rendering property. The main distinct feature of FST-OSCs is its mechanical stability against extreme mechanical Semitransparent organic solar cells (ST-OSCs) have attracted extensive attention for their potential greenhouse applications. Conventional ST-OSCs are typically based on indium tin oxide (ITO) electrodes which suffer from mechanical brittleness. Therefore, alternatives for ITO are required for realization of foldable-flexible ST-OSCs (FST-OSCs). Herein, flexible poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) electrodes are prepared as ITO alternatives via polyhydroxy compound (xylitol) microdoping and acid treatment. As a result, flexible opaque OSCs based on PBDB-T-2F:Y6 photoactive system yield a high efficiency of 14.20%. The desirable optic...

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“…That would decrease the device performance; (2) there might be interaction between the PEDOT:PSS and the nonfullerene active layer of PM6:IT‐4F. PEDOT:PSS is a complicated system with high acidity having a pH value of 1–2 and strong oxidation property . Hydrogen bond between the F atoms in active layer and hydrogen in the acidic PEDOT:PSS might induce unfavorable vertical phase segregation of the PEDOT:PSS for charge transport.…”

Section: Device Performance Of the Tandem Cells With Different Thicknmentioning

confidence: 99%

Incorporation of Hydrogen Molybdenum Bronze in Solution‐Processed Interconnecting Layer for Efficient Nonfullerene Tandem Organic Solar Cells

et al. 2019

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Tandem solar cells are attractive because they can break the Shockley–Queisser efficiency limit of single‐junction cells. However, it is still quite challenging to fabricate efficient nonfullerene tandem organic solar cells (OSCs) because of their complicated and vulnerable multilayers and interfaces. The interconnecting layer (ICL) between two subcells is the key part in efficient tandem solar cells, which should be designed properly based on the property of active layers. Herein, the incorporation of hydrogen molybdenum bronze (HxMoO3) between the bottom active layer and PEDOT:PSS/ZnO to form a new ICL is proposed. The contribution of the HxMoO3 is two fold: 1) it can well wet the hydrophobic active layer surface and form a uniform film. It provides a hydrophilic surface for the following deposition of PEDOT:PSS; 2) the HxMoO3 has a high work function of 5.4 eV that is higher than PEDOT:PSS (5.0 eV) and can extract holes more efficiently from the active layer with the deep highest occupied molecular orbital energy level. Nonfullerene tandem solar cells with a high fill factor of 76.0% and power conversion efficiency of 15.03% are obtained with this ICL.

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Optical properties and conductivity of PEDOT:PSS films treated by polyethylenimine solution for organic solar cells

Cited by 72 publications

References 33 publications

Flexible All‐Solution‐Processed Organic Solar Cells with High‐Performance Nonfullerene Active Layers

Flexible All‐Solution‐Processed Organic Solar Cells with High‐Performance Nonfullerene Active Layers

Foldable Semitransparent Organic Solar Cells for Photovoltaic and Photosynthesis

Incorporation of Hydrogen Molybdenum Bronze in Solution‐Processed Interconnecting Layer for Efficient Nonfullerene Tandem Organic Solar Cells

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