High Performance Flexible Transparent Electrode via One‐Step Multifunctional Treatment for Ag Nanonetwork Composites Semi‐Embedded in Low‐Temperature‐Processed Substrate for Highly Performed Organic Photovoltaics

Kim, Jin-Wook; Ouyang, Dan; Lu, Haifei; Ye, Fei; Guo, Yuwei; Zhao, Ni; Choy, Wallace C. H.

doi:10.1002/aenm.201903919

Cited by 59 publications

(59 citation statements)

References 68 publications

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“…The AVT decreases from 85% to 35% when AgNPs concentration increases from 12 to 100 mg mL −1 . AgNO 3 has been reported as chemical solder to weld AgNWs, [49][50][51] and therefore, it might connect AgNPs and MWCNTs together at the junctions. For AgNPs solution with high concentration, more AgNO 3 in MWCNTs dispersion increases the transmittance slightly.…”

Section: Preparation and Characterization Of Agcnts Filmmentioning

confidence: 99%

Efficient Semi‐Transparent Organic Solar Cells with High Color Rendering Index Enabled by Self‐Assembled and Knitted AgNPs/MWCNTs Transparent Top Electrode via Solution Process

Zhang

Babu

et al. 2021

Advanced Optical Materials

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conversion efficiency (PCE) has already exceeded 16% enabled by advanced photovoltaic materials. [3][4][5][6] Although opaque OSCs exhibit high efficiency, their usage is limited because they demand dedicated space and additional installation work on the roof, like traditional silicon solar cells. Therefore, the transparent property of OSCs was exploited for semi-transparent photovoltaic modules to extend their application in power-generating windows for buildings and automobiles. To fabricate efficient semi-transparent OSCs (STOSCs) with high average visible transmittance (AVT), [7] several approaches have been attempted for improving the visible light transparency of active layer, including molecular energy level modulating in non-fullerene acceptors, [8][9][10][11][12] usage of low-band gap organic semiconductors to shift absorption to near-infrared region, [13] fabrication of active layer with fiber network structure [14] and so on.On the other hand, developing transparent electrodes (TEs) with high conductivity to reduce the absorption/reflection in visible light without degrading interfacial contact is also equally important to achieve high-performance STOSCs. [2] Evaporated thin metal-based top electrodes were most reported to date due to their high conductivity and transparency. [15][16][17] However, the high cost and strict conditions of vacuum-deposited TEs are not suitable for large-area device fabrication and contradict the aim of renewable energy. [18] Furthermore, the transmittance of evaporated thin metal is not uniform throughout the visible region, resulting in low color-fidelity in STOSCs. [19] Therefore, in the past decade, scientists have advocated to develop solution-processed TEs, such as conducting polymers, [20][21][22] Ag nanowires (AgNWs), [23][24][25][26] graphene, [27][28][29][30] and carbon nanotubes (CNTs). [31][32][33][34] Nonetheless, the sheet resistance of polymers-based and carbon-based TEs is relatively high and even the lowest reported values to date is larger than 50 Ω sq −1 . Moreover, the acid treatment at high temperature for the conductivity enhancement of polymers adversely damages the underlying layers of OSC, [35][36][37] and hence complicated transfer process is required to be used as top TEs. [38,39] In addition, the unsatisfactory vertical conductivity of carbon materials and the stability issue of AgNWs and conducting polymers make them unappealing to be used in STOSCs. Semi-transparent organic solar cells (STOSCs) have attracted tremendous attention in power-generating windows for buildings and automobiles.Although STOSCs based on vacuum-deposited thin metal films exhibited power conversion efficiency exceeding 10%, solution-processed top transparent electrode (TE) is desirable for large-area and low-cost fabrication of STOSCs. Here, we present a self-assembled and knitted Ag nanoparticles/multi-walled carbon nanotubes composite thin film by solution process as transparent top electrode for STOSC. The composite film exhibits an extremely low sheet resistance of 14...

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Section: Preparation and Characterization Of Agcnts Filmmentioning

confidence: 99%

Efficient Semi‐Transparent Organic Solar Cells with High Color Rendering Index Enabled by Self‐Assembled and Knitted AgNPs/MWCNTs Transparent Top Electrode via Solution Process

Zhang

Babu

et al. 2021

Advanced Optical Materials

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“…Consequently, the flexible OSC with PM6:Y6 attained the highest PCE of 15.12%. [ 119 ] Meanwhile, Chen et al . reported a welding composite electrode consisting of AZO and AgNW (Em‐Ag/AgNW:AZO‐ SG), and the electrode exhibited an optimized FoM of 498 at 550 nm.…”

Section: Applications In Organic Solar Cellsmentioning

confidence: 99%

Solution‐Processed Silver Nanowire as Flexible Transparent Electrodes in Organic Solar Cells

Yang

Hou

2021

Chin. J. Chem.

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Silver | Nanostructures | Conducting materials | Electrode | Organic solar cellsOrganic solar cells (OSCs) have attracted much attention due to their advantages in fabricating flexible and semi-transparent devices. Especially, the light weight, flexibility and spectral adjustability make OSCs superior to silicon, perovskite and other thin film based solar cells in applications of integrated photovoltaic devices and wearable electronics. In flexible and semi-transparent OSCs, transparent conducting electrodes (TCEs) play a key role in obtaining high performances. Among various TCEs, silver nanowire (AgNW) has become a promising candidate due to its low sheet resistance, high optical transparency, excellent mechanical flexibility and solution processability. In this article, we review the recent advances in AgNW-based TCEs and their applications in the field of OSCs. Firstly, we introduce the general properties of AgNW, including optoelectronic and mechanical characteristics. Secondly, the preparation methods of AgNW are discussed, along with some approaches on the optimization of AgNW to overcome the shortcomings of TCEs. Thirdly, we discuss the applications of AgNW as TCEs in fabricating flexible and semi-transparent OSCs, including the use of AgNW as bottom and top electrodes. Finally, we point out the challenges in AgNW-based TCEs and suggest several guidelines for preparing AgNW so as to meet the demands for the practical use of OSCs.

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“…[ 49 ] Consequently, with the continuous development of efficient photoactive materials, significant progress has been achieved for flexible OSCs in recent years. [ 21,26–28,50–64 ] As shown in Table 1 , the photovoltaic performances of representative flexible OSCs are summarized, and the molecular structures of corresponding materials are shown in Figure .…”

Section: Introductionmentioning

confidence: 99%

Flexible Organic Solar Cells: Progress and Challenges

et al. 2021

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Compared with inorganic photovoltaic technologies, flexibility is the most prominent feature of organic solar cells (OSCs). Flexible OSCs have been considered as one of the most promising directions in the OSC field, and have drawn tremendous attention in recent years. However, the power conversion efficiencies (PCEs) of flexible OSCs still lag behind those of their rigid counterparts. To further improve the performance of flexible OSCs, it is of great necessity for synergistic efforts to optimize flexible transparent electrodes (FTEs), photoactive materials, electrode buffer layers, and device structure engineering. Herein, the recent progress in flexible OSCs from the perspective of FTEs, including indium tin oxides, carbon nanomaterials, conducting polymers, silver nanowires, and ultrathin metal films and metal meshes, is summarized. In addition, the photoactive materials and electrode buffer layers in flexible OSCs are discussed to reveal the effects of material engineering and interface modification. Finally, a discussion of the future outlook and challenges of flexible OSCs is presented.

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High Performance Flexible Transparent Electrode via One‐Step Multifunctional Treatment for Ag Nanonetwork Composites Semi‐Embedded in Low‐Temperature‐Processed Substrate for Highly Performed Organic Photovoltaics

Cited by 59 publications

References 68 publications

Efficient Semi‐Transparent Organic Solar Cells with High Color Rendering Index Enabled by Self‐Assembled and Knitted AgNPs/MWCNTs Transparent Top Electrode via Solution Process

Efficient Semi‐Transparent Organic Solar Cells with High Color Rendering Index Enabled by Self‐Assembled and Knitted AgNPs/MWCNTs Transparent Top Electrode via Solution Process

Solution‐Processed Silver Nanowire as Flexible Transparent Electrodes in Organic Solar Cells

Flexible Organic Solar Cells: Progress and Challenges

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