Scale-up fabrication and characteristic study of oligomer-like small-molecule solar cells by ambient halogen-free sheet-to-sheet and roll-to-roll slot-die coating

Sung, Yun-Ming; Tsao, Cheng‐Si; Lin, Hua-Kai; Cha, Hou‐Chin; Huang, Yu‐Ching

doi:10.1016/j.solener.2021.11.080

Cited by 8 publications

(3 citation statements)

References 58 publications

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“…This opens the possibility of using them to coat substrates that span a range of sizes. Ultimately, this is advantageous in terms of upscaling the fabrication of electrochromic devices by large-scale-processing techniques such as roll-to-roll printing [ 24 , 25 , 26 ], spray coating [ 27 , 28 ], ink-jet printing [ 29 , 30 , 31 ], and slot-die coating [ 32 ].…”

Section: Overviewmentioning

confidence: 99%

Survey of Recent Advances in Molecular Fluorophores, Unconjugated Polymers, and Emerging Functional Materials Designed for Electrofluorochromic Use

2023

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In this review, recent advances that exploit the intrinsic emission of organic materials for reversibly modulating their intensity with applied potential are surveyed. Key design strategies that have been adopted during the past five years for developing such electrofluorochromic materials are presented, focusing on molecular fluorophores that are coupled with redox-active moieties, intrinsically electroactive molecular fluorophores, and unconjugated emissive organic polymers. The structural effects, main challenges, and strides toward addressing the limitations of emerging fluorescent materials that are electrochemically responsive are surveyed, along with how these can be adapted for their use in electrofluorochromic devices.

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Section: Overviewmentioning

confidence: 99%

Survey of Recent Advances in Molecular Fluorophores, Unconjugated Polymers, and Emerging Functional Materials Designed for Electrofluorochromic Use

2023

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“…Polymer solar cells (PSCs) as a promising alternative green energy possess the advantages of low cost, ambient solution process, light weight, flexible, semitransparency, and easy large‐area fabrication. The development of non‐fullerene acceptor (NFA) incorporated into the so‐called bulk‐heterojunction (BHJ) PSCs 1–3 enabled the rapid progress of power conversion efficiency (PCE), achieving 15.7% 4 . Polymer donor PM6, NFA acceptor Y6, and fullerene acceptor were incorporated into the active layer: as the ternary or quaternary PSCs further improved the PCE to 16.7–18.1% 5–9 .…”

Section: Introductionmentioning

confidence: 99%

High transparency and performance slot‐die‐coated large‐area polymer solar module

Sung

Tsao

Cha

et al. 2023

Progress in Photovoltaics

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We fabricate polymer solar cells (PSCs) and modules by sheet‐to‐sheet slot‐die coating under air environment based on halogen‐free host solvent. How to upscale small‐area PSC to large‐area PSC module is demonstrated here. The opaque module exhibits the most superior performance among the slot‐die‐coated modules reported. The scaling of both the semitransparent top electrode and PSC module is a challenge due to the complex difficulties. In this study, the semitransparent MoO3/Ag/MoO3 top electrode is successfully upscaled to be in the large‐area semitransparent PSC module. Ag layer thickness as reflector in the tri‐layer electrode is used to tune the trade‐off between transmittance, conductivity, and the light absorption in the active layer. The matching combination of transmittance, absorption spectra of MoO3/Ag/MoO3 top electrode, and active layer is a main key of our approach greatly improving photovoltaic and optical performance. The power conversion efficiencies (PCEs) of the semitransparent PSC modules with Ag thickness of 25, 20, and 15 nm are 7.1%, 5.9%, and 4.4%, respectively. The corresponding average visible transmittance (AVT) values are 20.5%, 28.3%, and 36.1%, respectively. The transmittance values at 550 nm are ranging from 24% to 40%. According to the review of all the reported semitransparent modules (>10 cm2), our modules demonstrate the excellent trade‐off performance about two times better than the large‐area semitransparent PSC modules currently reported either based on the similar PCEs or AVTs.

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“…Transparent conductive films (TCFs), which are responsible for electric conduction and light transmission, play a crucial role in various optoelectronic devices, such as displays [1][2][3], solar cells [4,5], electrochromic devices [6,7], and transparent film heaters [8,9]. Tin-doped indium oxide (ITO) is currently the most popular material for TCFs due to its excellent transmittance (T ≈ 90% @ 550 nm) and low sheet resistance (R sh ≈ 20 Ω/sq) [10].…”

Section: Introductionmentioning

confidence: 99%

A Green Approach for High Oxidation Resistance, Flexible Transparent Conductive Films Based on Reduced Graphene Oxide and Copper Nanowires

Lin

Huang

et al. 2022

Nanoscale Res Lett

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Copper nanowires (CuNWs)-based thin film is one of the potential alternatives to tin-doped indium oxide (ITO) in terms of transparent conductive films (TCFs). However, the severe problem of atmospheric oxidation restricts their practical applications. In this work, we develop a simple approach to fabricate highly stable TCFs through the dip-coating method using reduced graphene oxide (rGO) and CuNWs as the primary materials. Compared with previous works using toxic reduction agents, herein, the CuNWs are synthesized via a green aqueous process using glucose and lactic acid as the reductants, and rGO is prepared through the modified Hummers’ method followed by a hydrogen-annealing process to form hydrogen-annealing-reduced graphene oxide (h-rGO). In the rGO/CuNWs films, the dip-coated graphene oxide layer can increase the adhesion of the CuNWs on the substrate, and the fabricated h-rGO/CuNWs can exhibit high atmospheric oxidation resistance and excellent flexibility. The sheet resistance of the h-rGO/CuNWs film only increased from 25.1 to 42.2 Ω/sq after exposure to ambient atmosphere for 30 days and remained almost unchanged after the dynamic bending test for 2500 cycles at a constant radius of 5.3 mm. The h-rGO/CuNWs TCF can be not only fabricated via a route with a superior inexpensive and safe method but also possessed competitive optoelectronic properties with high electrical stability and flexibility, demonstrating great opportunities for future optoelectronic applications.

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Scale-up fabrication and characteristic study of oligomer-like small-molecule solar cells by ambient halogen-free sheet-to-sheet and roll-to-roll slot-die coating

Cited by 8 publications

References 58 publications

Survey of Recent Advances in Molecular Fluorophores, Unconjugated Polymers, and Emerging Functional Materials Designed for Electrofluorochromic Use

Survey of Recent Advances in Molecular Fluorophores, Unconjugated Polymers, and Emerging Functional Materials Designed for Electrofluorochromic Use

High transparency and performance slot‐die‐coated large‐area polymer solar module

A Green Approach for High Oxidation Resistance, Flexible Transparent Conductive Films Based on Reduced Graphene Oxide and Copper Nanowires

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