Recent progress of ultra-narrow-bandgap polymer donors for NIR-absorbing organic solar cells

Lim, Dae‐Hee; Ha, Jae Du; Choi, Hyosung; Yoon, Sung Cheol; Lee, Bo Ram; Ko, Seo‐Jin

doi:10.1039/d1na00245g

Cited by 32 publications

(25 citation statements)

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“…[59][60][61][62][63] In contrast, the requirements for NIR light harvesting can be satisfied in organic solar cell (OSC) featuring ultra-narrow bandgap of donor and acceptor materials in a bulk heterojunction. [64,65] To achieve selective absorption of both UV and NIR, excitonic materials with distinct absorption maxima and minima are employed such as low-bandgap polymer donors and non-fullerene small molecular acceptors. [17,64,65] Within these organic photoactive materials, the optical absorption mechanism is manifested in discrete molecular orbitals (S 1 , S 2 , … S n ) from the ground state (S 0 ).…”

Section: Pcementioning

confidence: 99%

Tunable Photovoltaics: Adapting Solar Cell Technologies to Versatile Applications

Meddeb

Götz‐Köhler

Neugebohrn

et al. 2022

Advanced Energy Materials

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solar, wind, hydro, geothermal, and biomass, to enable a steady mitigation of greenhouse gas emissions, which are causing the planetary climate change and global warming. [5][6][7] Additionally, due to the economic development and the worldwide urbanization, a continuous rise of the global energy consumption across all key sectors, that is, power, heating, industry, and transport is occurring. This is expressed by an increase in the annual global electricity demand by 4.5% in 2021 corresponding to additional 1000 TWh. [4] Hence, strict criteria for the selection of competitive and abundant energy alternatives are imposed, requiring high yield at affordable prices. [8] The share of total renewables power generation excluding hydropower exceeded 3000 TWh in 2020, corresponding to almost 12% of the global electricity generation. [3] Considering an effective synergy between various sustainable energy candidates, solar photovoltaics (PV) have demonstrated great capabilities that can satisfy the requirements in the pathway towards 100% renewable electricity. [9][10][11][12] Owing to the research and development activities over the last decades, the power conversion efficiencies of solar cells (SC) have skyrocketed with a prolonged operation lifetime (>15 years) and a drastic plummeting in manufacturing costs (global average module selling price below $0.25 per W). [6,[13][14][15] The rapid universal deployment of PV resulted in a contribution of about 3.4% in the worldwide electricity generation in 2020. [3] Presently, the global installed PV capacity is approaching 1 TW and it is envisioned to reach ≈10 TW by 2030 and 30 to 70 TW by 2050. [16] Interestingly, along with massive electricity production using conventional solar power plants and rooftop solar panels, ancillary concepts of PV offer new strategies for supplying modern systems in versatile applications. [17][18][19] Moreover, diverse functionalities beyond solar energy harvesting can be afforded by adaptive PV, including aesthetic appearance, visual comfort and thermal management. [17,18,20,21] The distributed nature and the ubiquitous accessibility of multifunctional PV products are substantial features of solar PV in contrast to other renewable energies. However, traditional SCs dominating the market impose intrinsic optoelectronic and thermomechanical limitations, that prohibit their multifunctional utilization. To overcome these drawbacks, novel functional materials and innovative device architecture Solar photovoltaics (PV) offer viable and sustainable solutions to satisfy the growing energy demand and to meet the pressing climate targets. The deployment of conventional PV technologies is one of the major contributors of the ongoing energy transition in electricity power sector. However, the diversity of PV paradigms can open different opportunities for supplying modern systems in a wide range of terrestrial, marine, and aerospace applications. Such ubiquitous and versatile applications necessitate the development of PV technologies with customized desig...

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Section: Pcementioning

confidence: 99%

Tunable Photovoltaics: Adapting Solar Cell Technologies to Versatile Applications

Meddeb

Götz‐Köhler

Neugebohrn

et al. 2022

Advanced Energy Materials

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“…Therefore, other approaches are required. The conjugated system can be represented by two resonance structures, the aromatic and the quinoidal form [7,28,[30][31][32]. One of the main synthetic strategies to narrow the band gap of donor polymers is to stabilize the quinoidal form, such as by fusing a second ring to the polymer backbone that provides aromatic resonance stabilization energy upon formation of the quinoid form, as shown in Figure 1A.…”

Section: Materials 21 Narrow Band Gap Polymer Donorsmentioning

confidence: 99%

“…Another prominent design strategy that dominates synthetic efforts are donoracceptor (DA) type polymers, consisting of alternating electron-rich and electron-poor motives [31,32,[39][40][41][42][43]. The interaction of the donor's highest occupied molecular orbital (HOMO) with the acceptors' HOMO leads to the formation of two hybrid orbitals of non-degenerate energy, thus one level being energetically lower than the HOMOs of the isolated moieties, as described by MO theory [44,45].…”

Section: Materials 21 Narrow Band Gap Polymer Donorsmentioning

confidence: 99%

“…Commonly used motives include the electron-rich D moieties thieno [3,4-b]thiophene (BDT), cyclopentadithiophene (CPDT) and dithieno [3,2-b:2 ,3 -d]pyran (DTP), and the electron-poor A units diketopyrrolopyrrole (DPP), thienopyrzine (TP), benzothiadiazole (BT), and isoindigo (II) [28,30,46,47]. The synthetic strategies for narrow bandgap donor polymers are detailed further in the literature [29][30][31]38,48].…”

Section: Materials 21 Narrow Band Gap Polymer Donorsmentioning

confidence: 99%

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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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“…Therefore, exploring high-performance filter-free NIR-PDs has become a research hotspot in this field. NIR-PDs with excellent performance are expected to have a high external quantum efficiency (EQE) at the required wavelength range, a low dark current, a short response time, a high responsivity, a high specific detectivity, etc. − …”

Section: Introductionmentioning

confidence: 99%

High-Performance Near-Infrared Photodetectors Based on the Synergy Effect of Short Wavelength Light Filter and Long Wavelength Response of a Perovskite/Polymer Hybrid Structure

Zhang

Qin

Huo

et al. 2021

ACS Appl. Mater. Interfaces

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Near-infrared photodetectors (NIR-PDs) are widely used in communications, biomedical imaging, and national defense. Here we report a new strategy to prepare a short wavelength light filter based NIR-PDs by introducing an interface layer between the perovskite layer and the polymer layer to achieve the selective passage of carriers. Through the synergistic effect of the perovskite and the interface layer, the short wavelength light component in the signal spectrum is effectively filtered out. The organic polymer layer with a bulk heterojunction structure is applied to realize the absorption and conversion of near-infrared light. The prepared device achieves a maximum external quantum efficiency of 83.7% without bias, a high specific detectivity of 1.52 × 1013 Jones, an NIR responsivity of 0.577A/W, and a short response time of 1.73/0.97 μs within the detection range from 770 to 900 nm. All these properties show great advantages compared with other perovskite/polymer hybrid NIR photodetectors that have been reported. This innovative strategy provides a new way to prepare high-performance near-infrared photodetectors.

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Recent progress of ultra-narrow-bandgap polymer donors for NIR-absorbing organic solar cells

Abstract: Solution-processed near-infrared (NIR)-absorbing organic solar cells (OSCs) have been explored worldwide because of their potential as donor:acceptor bulk heterojunction (BHJ) blends. In addition, NIR-absorbing OSCs have attracted attention as high...

Cited by 32 publications

References 98 publications

Tunable Photovoltaics: Adapting Solar Cell Technologies to Versatile Applications

Tunable Photovoltaics: Adapting Solar Cell Technologies to Versatile Applications

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

High-Performance Near-Infrared Photodetectors Based on the Synergy Effect of Short Wavelength Light Filter and Long Wavelength Response of a Perovskite/Polymer Hybrid Structure

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