Unraveling Device Physics of Dilute‐Donor Narrow‐Bandgap Organic Solar Cells with Highly Transparent Active Layers

Schopp, Nora; Akhtanova, Gulnur; Panoy, Patchareepond; Arbuz, Alexandr; Chae, Sangmin; Yi, Ahra; Kim, Hyo Jung; Promarak, Vinich; Nguyen, Thuc‐Quyen; Брус, В. В.

doi:10.1002/adma.202203796

Cited by 39 publications

(38 citation statements)

References 90 publications

(165 reference statements)

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“…As shown in the TEM image of the blend film in Fig. 4i-l, bright and dark regions correspond to regions with different scattering contrasts for donor-rich or acceptor-rich phases [45]. With the decrease in donor content (from 50% to 40%), clear, bright areas were observed in blend films.…”

Section: Morphology Characterization Of Dilute Donor Blendsmentioning

confidence: 85%

“…In addition, dilute donor and multicomponent strategies are also golden methods for device optimization on ST-OSCs. For example, Schopp et al [45] reported that the dilute donor increased the average visible transmittance (AVT) of PCE-Th:COTIC-4F active-layer from 63.8% to 69.8%, accompanied by a slight decrease in PCE from 7.0% to 6.5%. In 2021, Hu et al [23] reported a ternary blend with two miscible narrow-bandgap acceptors (Y6-1O and Y6), leading to ST-OSCs with an AVT of 20.2% and a PCE of 13.02%.…”

Section: Introductionmentioning

confidence: 99%

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基于透明活性层的高效柔性半透明有机太阳能电池

Song

Zhang

et al. 2023

Sci. China Mater.

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The flexibility and translucency aspects are unparalleled advantages of organic solar cells (OSCs), which have attracted great attention from the scientific and industrial communities. Currently, the key to improve the performance of flexible semi-transparent OSCs (ST-OSCs) lies in flexible transparent electrodes (FTEs) and the light-absorbing active layer. Herein, high-quality multi-layer FTEs with solarweighted transmittance of 84.8% are employed, which allows the photo-active layer to effectively capture light and improve the light management in devices. In addition, multiple welldeveloped strategies, including alloy-like near-infrared acceptors (Y6:m-BTP-PhC6) and dilution of the donor with visible-range absorption (PM6), precisely utilize each band of photons, significantly balancing the conflict between photovoltaic and optical properties in ST-OSCs. The dilution of PM6 leads to highly transparent active layers with average visible transmittance of 39.3%, which is due to a decrease in donor absorption in the visible range and an increase in nearinfrared absorption of the acceptor. As a result, high efficiencies of 16.44% and 11.48% are obtained for flexible opaque and semi-transparent cells. To the best of our knowledge, these results represent one of the best values for ST-OSCs based on flexible substrates. This work paves the path for realizing highperformance flexible ST-OSCs with excellent mechanical robustness, and contributes a major step toward practical applications.

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Section: Morphology Characterization Of Dilute Donor Blendsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

基于透明活性层的高效柔性半透明有机太阳能电池

Song

Zhang

et al. 2023

Sci. China Mater.

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“…Second, the dilute donor approach has been employed by several groups to improve as a platform for increasing the AVT while maintaining a high PCE due to increased IR absorption by a narrow band gap acceptor compound and reduced absorption by a donor compound that absorbs (partially) in the visible range [80,[111][112][113]. In 2021, Yao et al studied PM6:Y6 OPVs with reduced donor content and found an efficiency of over 10% in dilute donor solar cells with only 10 wt% PM6, thanks to efficient charge generation, electron and hole transport, slow charge recombination, and field-insensitive extraction [111].…”

Section: Current Performance and Strategies To Increase Luementioning

confidence: 99%

A Review on the Materials Science and Device Physics of Semitransparent Organic Photovoltaics

Schopp

Брус

2022

Energies

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In this review, the current state of materials science and the device physics of semitransparent organic solar cells is summarized. Relevant synthetic strategies to narrow the band gap of organic semiconducting molecules are outlined, and recent developments in the polymer donor and near-infrared absorbing acceptor materials are discussed. Next, an overview of transparent electrodes is given, including oxides, multi-stacks, thin metal, and solution processed electrodes, as well as considerations that are unique to ST-OPVs. The remainder of this review focuses on the device engineering of ST-OPVs. The figures of merit and the theoretical limitations of ST-OPVs are covered, as well as strategies to improve the light utilization efficiency. Lastly, the importance of creating an in-depth understanding of the device physics of ST-OPVs is emphasized and the existing works that answer fundamental questions about the inherent changes in the optoelectronic processes in transparent devices are presented in a condensed way. This last part outlines the changes that are unique for devices with increased transparency and the resulting implications, serving as a point of reference for the systematic development of next-generation ST-OPVs.

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“…20−23 Nonsolution processes offer the advantage of easy patterning but suffer from nonuniform deposition and difficulty in controlling the resolution/thickness. 5,24 In addition, nonsolution approaches normally involve complicated processing, which offer low compatibility in making flexible electronic devices. Solution processes have attracted increasing research interests in preparing FTEs, and they have shown advantages of mild operation conditions, high throughput, and high capacity in low-cost large-area fabrication.…”

Section: Introductionmentioning

confidence: 99%

Solution-Processed Flexible Transparent Electrodes for Printable Electronics

Meng

Wang

et al. 2023

ACS Nano

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Flexible transparent electrodes (FTEs) have been widely witnessed in various printable electronic devices, especially those involving light. So far, solution processes have demonstrated increasing advantages in preparing FTEs not only in their mild operation conditions and high-throughput but also in the diversity in micropatterning conductive nanomaterials into networks. For the FTEs, both high transparency and high conductivity are desirable, which therefore create requirements for the conductive network by considering the trade-off relationship between the coverage and the micropatterns of the network. In addition, the conductive networks also affect the flexibility of FTEs due to the deformation during bending/stretching. Consequently, solution processes capable of micropatterning conductive nanomaterials including nanoparticles, nanowires/polymers, and graphene/MXene play a crucial role in determining the performance of FTEs. Here, we reviewed recent research progress on solution-processed FTEs, including the solution processes, the solution-processable conductive nanomaterials and the substrates for making FTEs, and applications of FTEs in flexible electronics. Finally, we proposed several perspective outlooks of the FTEs, which aim at not only the enhanced performance but also the performances in extreme conditions and in integration. We believe that the review would offer inspiration for developing functional FTEs.

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Unraveling Device Physics of Dilute‐Donor Narrow‐Bandgap Organic Solar Cells with Highly Transparent Active Layers

Cited by 39 publications

References 90 publications

基于透明活性层的高效柔性半透明有机太阳能电池

基于透明活性层的高效柔性半透明有机太阳能电池

A Review on the Materials Science and Device Physics of Semitransparent Organic Photovoltaics

Solution-Processed Flexible Transparent Electrodes for Printable Electronics

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