A polymer donor with versatility for fabricating high-performance ternary organic photovoltaics

Jiang, Bing‐Huang; Peng, Ya-Juan; Su, Yu Wei; Chang, Jiafu; Chueh, Chu‐Chen; Shieh, Tien‐Shou; Huang, Chun-Jen; Chen, Chih‐Ping

doi:10.1016/j.cej.2021.133950

Cited by 31 publications

(35 citation statements)

References 47 publications

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“…[ 274–277 ] Usually, non‐fullerene small molecular guest acceptors require higher LUMO levels than the host acceptors, and polymer guest donors need higher HOMO levels than the host donors to form appropriate energy alignment. [ 278–284 ] Min et al. [ 217 ] introduced asymmetric acceptor BTP‐2F2Cl to PM1:L8‐BO to fabricate ternary devices and achieved an efficiency as high as 19.17%.…”

Section: Advanced Device Fabrication Technologiesmentioning

confidence: 99%

Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

Jin

Wang

et al. 2023

Adv Funct Materials

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With the emergence of ADA'DA-type (Y-series) non-fullerene acceptors (NFAs), the power conversion efficiencies (PCEs) of organic photovoltaic devices have been constantly refreshed and gradually reached 20% in recent years (19% for single junction and 20% for tandem device). The acceptors possess specific design concept, which greatly enrich the NFA types and have excellent compatibility with many donor materials. It is gratifying to note that the previously underperforming donor materials combine with these regulated acceptors to shine again. Nowadays, the concept of modular design is widely used in the research of acceptors and donors, injecting new vitality into the field of organic photovoltaics. Furthermore, these acceptors also promote the research of multicomponent devices, tandem devices, bilayer devices, processing solvent engineering, and additive engineering. Herein, the latest progresses of polymer solar cells with efficiency over 17% are briefly reviewed from the aspects of active material design, interface material development, and device technology. At last, the opportunities and challenges of organic photovoltaic commercialization in the future are discussed.

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Section: Advanced Device Fabrication Technologiesmentioning

confidence: 99%

Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

Jin

Wang

et al. 2023

Adv Funct Materials

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“…According to previous reports, a guest acceptor having a LUMO energy level higher than that of the host acceptor can lead to a decrease in energy loss, with the premise that introducing the guest acceptor could lead to effective mixing with the host acceptor. 14,56 Figure 1c displays the energy levels of PM6, Y6, 14 and the NFAs; notably, all of the NFAs had LUMO energy levels higher than that of Y6. Thus, the slight lowering of the V OC values might be attributable to the miscibility of our NFAs with Y6, including the variation in the blend morphology of its counterpart, as we discuss below.…”

Section: Optical Absorption and Electrochemical Propertiesmentioning

confidence: 99%

“…OPVs appear likely to complement or replace traditional solar cells in applications such as power source for greenhouse lighting, indoor light harvesting, floating photovoltaics (PVs), and self-powered wearable sensors/smart clothing. − Very recently, great strides have been made in overcoming the low power conversion efficiencies (PCEs) and instabilities, further promoting this technology toward practical commercialization. Several publications have demonstrated single-junction OPVs displaying breakthrough PCEs (> 18%) − and superior long-term stability when exposed to light, heat, or air (without encapsulation). ,− These advances in the performance characteristics of OPVs can be attributed to the successful development of non-fullerene acceptors (NFAs), which possess highly tunable chemical structures ranging from small molecules to oligomers and polymers as well as outstanding optoelectronic properties. − …”

Section: Introductionmentioning

confidence: 99%

High-Performance Ternary Organic Photovoltaics Incorporating Small-Molecule Acceptors with an Unfused-Ring Core

Jiang

You

Lin

et al. 2022

ACS Appl. Energy Mater.

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Organic photovoltaics (OPVs) have made enormous progress in recent years, benefiting from the rapid development of non-fullerene acceptors (NFAs). Most high-performance NFAs, however, have featured π-conjugated backbones with large-fused core structures, increasing the complexity and cost of their synthesis and limiting their practical commercialization. In this study, we synthesized a series of acceptor–donor–acceptor-configured small-molecule acceptors (NTCPDTCN, NTCPDTID, and NTCPDT2F) based on a core structure featuring a naphthobisthiadiazole (NT) group and two cyclopenta[2,1-b,3,4-b′]dithiophene (CPDT) groups as the unfused-ring central unit and equipping malononitrile (CN), 2-(3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (ID), and 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (2F) groups as terminal groups. When blended with PM7, the NTCPDTCN-containing binary device displayed a high open-circuit voltage (V OC) of 1.04 V, without self-aggregation, as well as the best device performance. When blended with PM6:Y6, the ternary NTCPDTCN-, NTCPDTID-, and NTCPDT2F-based OPVs provided power conversion efficiencies of 15.4 ± 0.09, 14.6 ± 0.15, and 16.0 ± 0.08%, respectively. NTCPDT2F provided complementary absorption and allowed fine-tuning of the blend morphology, resulting in suppression of charge recombination and improvements in charge generation and collection, thereby achieving the highest device performance. Thus, our findings might provide some directions for developing high-performance ternary OPVs through the introduction of unfused-ring small-molecule acceptors.

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“…In a previous report, the polymer donor TPD-3F and NFA ZY-4Cl were used to provide complementary absorption and an optimized blend morphology, resulting in PM6:Y6-based ternary OPVs having power conversion efficiencies (PCEs) of 17.0 and 17.6%, respectively. , Zhan et al reported a ternary OPV having a breakthrough PCE of 19.3%, prepared by combining symmetric and asymmetric NFAs that were used to regulate energy loss and charge collection . A similar strategy might also be appropriate for OPDs. − NFAs with near-infrared (NIR) absorption and adjustable energy levels have the potential to extend the responsivityin particular, the NIR responseof OPDs . By optimizing the ternary active layer to realize broadband detection, such OPDs can overcome the high costs and complicated manufacturing processes that are typical of tandem-structure devices. − …”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Ternary Near-Infrared Organic Photodetectors for Biometric Monitoring

Jiang

Hsiao

Lin

et al. 2023

ACS Appl. Mater. Interfaces

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Near-infrared (NIR) small-molecule acceptors that absorb at wavelengths of up to 1000 nm are attractive for applications in organic photodetectors (OPDs) and biometrics. In this study, we incorporated IEICO-4F as the third component for PffBT4T-2OD:PC 71 BM-based OPDs to provide an efficient NIR response while greatly suppressing the leakage current at reverse bias. By varying the blend ratio and thickness (250−600 nm), we obtained an NIR OPD displaying an ultralow dark-current density (J D = 2.62 nA cm −2 ), ultrahigh detectivity [D* = 7.2 × 10 12 Jones (850 nm)], high sensitivity, and photoresponsivity covering the region from the ultraviolet to the NIR. We used tapping-mode atomic force microscopy, optical microscopy, grazing-incidence wide-angle X-ray scattering, and contact angle measurements to investigate the effect of IEICO-4F on the performance of the ternary OPDs. The low compatibility of PffBT4T-2OD and IEICO-4F, originating from weak intermolecular interactions, allowed us to manipulate the degree of phase separation between the donor and acceptor in the ternary blends, leading to an optimized blend morphology featuring efficient charge separation, transport, and collection. To demonstrate its applicability, we integrated our OPD with two light-emitting diodes and used the system for precisely calculated transmissive pulse oximetry.

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A polymer donor with versatility for fabricating high-performance ternary organic photovoltaics

Cited by 31 publications

References 47 publications

Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

Recent Developments of Polymer Solar Cells with Photovoltaic Performance over 17%

High-Performance Ternary Organic Photovoltaics Incorporating Small-Molecule Acceptors with an Unfused-Ring Core

Highly Efficient Ternary Near-Infrared Organic Photodetectors for Biometric Monitoring

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