Non-fullerene acceptors with alkylthiothiophene side chains for efficient non-halogenated solvent processed indoor organic photovoltaics

An, Na; Lee, Ji Eun; Lee, Woojin; Yuk, Dohun; Song, Seyeong; Wang, Canjie; Kwon, Soon‐Ki; Kim, Yun‐Hi; Kim, Jin Young

doi:10.1039/d2tc03297j

Cited by 7 publications

(4 citation statements)

References 72 publications

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“…The higher R sh of the ternary blend suppresses the parasitic leakage current and improves FF, thus leading to enhanced PCE under indoor conditions . The experimental results demonstrate that the third component polymer donor PTO2 not only has good complementary absorption and energy level alignment but also exhibits proper mixing and packing with the polymer donor PM7 and NF-SMA DTSiC-4F, resulting in efficient phase separation and charge transfer. , As far as we know, the obtained PCE results under indoor conditions are one of the best binary/ternary-based systems from solution processing with eco-friendly solvents …”

Section: Resultsmentioning

confidence: 99%

“…48,49 As far as we know, the obtained PCE results under indoor conditions are one of the best binary/ternary-based systems from solution processing with eco-friendly solvents. 56 Energy Loss Analysis. In general, the V oc of an OPV is expected to be positively correlated with the difference between the LUMO level of the acceptor and the HOMO level of the donor.…”

Section: ■ Introductionmentioning

confidence: 99%

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Eco-Friendly Solvent-Processed Dithienosilicon-Bridged Carbazole-Based Small-Molecule Acceptors Achieved over 25.7% PCE in Ternary Devices under Indoor Conditions

Busireddy

Huang

et al. 2023

ACS Appl. Mater. Interfaces

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Terminal acceptor atoms and side-chain functionalization play a vital role in the construction of efficient nonfullerene small-molecule acceptors (NF-SMAs) for AM1.5G/indoor organic photovoltaic (OPV) applications. In this work, we report three dithienosilicon-bridged carbazole-based (DTSiC) ladder-type (A–DD′D–A) NF-SMAs for AM1.5G/indoor OPVs. First, we synthesize DTSiC-4F and DTSiC-2M, which are composed of a fused DTSiC-based central core with difluorinated 1,1-dicyanomethylene-3-indanone (2F-IC) and methylated IC (M-IC) end groups, respectively. Then, alkoxy chains are introduced in the fused carbazole backbone of DTSiC-4F to form DTSiCODe-4F. From solution to film absorption, DTSiC-4F exhibits a bathochromic shift with strong π–π interactions, which improves the short-circuit current density (J sc) and the fill factor (FF). On the other hand, DTSiC-2M and DTSiCODe-4F display up-shifting lowest unoccupied molecular orbital (LUMO) energy levels, which enhances the open-circuit voltage (V oc). As a result, under both AM1.5G/indoor conditions, the devices based on PM7:DTSiC-4F, PM7:DTSiC-2M, and PM7:DTSiCOCe-4F show power conversion efficiencies (PCEs) of 13.13/21.80%, 8.62/20.02, and 9.41/20.56%, respectively. Furthermore, the addition of a third component to the active layer of binary devices is also a simple and efficient strategy to achieve higher photovoltaic efficiencies. Therefore, the conjugated polymer donor PTO2 is introduced into the PM7:DTSiC-4F active layer because of the hypsochromically shifted complementary absorption, deep highest occupied molecular orbital (HOMO) energy level, good miscibility with PM7 and DTSiC-4F, and optimal film morphology. The resulting ternary OSC device based on PTO2:PM7:DTSiC-4F can improve exciton generation, phase separation, charge transport, and charge extraction. As a consequence, the PTO2:PM7:DTSiC-4F-based ternary device achieves an outstanding PCE of 13.33/25.70% under AM1.5G/indoor conditions. As far as we know, the obtained PCE results under indoor conditions are one of the best binary/ternary-based systems processed from eco-friendly solvents.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Eco-Friendly Solvent-Processed Dithienosilicon-Bridged Carbazole-Based Small-Molecule Acceptors Achieved over 25.7% PCE in Ternary Devices under Indoor Conditions

Busireddy

Huang

et al. 2023

ACS Appl. Mater. Interfaces

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“…NFAs provide outstanding benefits in terms of bandgap regulation, decreased energy loss, NIR region absorption, thermal stability, and photostability. As a result, considerable efforts have been invested into fabricating high-performance NFAs for IOSCs (figure 8 shows the chemical structures of various NFAs used in different IOSCs and table 1 the summary of photovoltaic properties of previously reported NFA based IOSCs) [92][93][94][95][96][97][98][99][100][101][102]. Cui et al developed a new NFA, IO-4Cl, with a bandgap of 1.89 eV in 2018.…”

Section: Nfas For Ioscsmentioning

confidence: 99%

Recent developments in non-fullerene-acceptor-based indoor organic solar cells

Biswas,

Lee,

Choi

et al. 2023

J. Phys. Mater.

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For over a decade, donor-acceptor blends composed of organic donors and fullerene acceptors dominated indoor organic solar cells (IOSCs). Numerous researchers have invested time to conduct extensive studies on developing new donor acceptor materials, interlayers, minimizing energy losses, and enhancing the open-circuit voltage (V OC) through device and material engineering, and optimizing device architectures to achieve highly efficient, environmentally stable, and commercially acceptable IOSCs. Through such efforts, the maximum power conversion efficiencies (PCEs) of IOSCs have surpassed 35%. In this regard, the transition from a fullerene to non-fullerene acceptor (NFA) is a useful strategy for enhancing the PCEs of IOSCs by allowing adjustment of the energy levels for compatibility with the indoor light spectrum and by improving photon absorption in the visible range, thereby boosting photocurrent generation and enhancing V OC. NFA-based indoor organic photovoltaic systems have recently drawn interest from the scholarly community. To compete with the standard batteries used in the Internet of Things devices, additional research is needed to enhance several characteristics, including manufacturing costs and device longevity, which must maintain at least 80% of their initial PCEs for more than 10 years. Further development in this field can greatly benefit from a thorough and comprehensive review on this field. Hence, this review explores recent advances in IOSCs systems based on NFAs. First, we explain several methods used to create extremely effective IOSCs, IOSCs based on fullerene acceptors are next reviewed and discussed. The disadvantages of using fullerene acceptors in IOSCs are noted. Then, we introduce NFAs and explore existing research on the subject. Finally, we discuss the commercial potential of NFA-based IOSCs and their future outlook.

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“…Over the years, state-of-the-art polymer-based organic semiconductors have improved extensively due to the number of unique features in electronic applications such as organic photovoltaic cells (OPVs), 1,2 organic field-effect transistors (OFETs), 3–6 organic light-emitting diodes (OLEDs) 7–11 and memory devices. 12,13 Among the organic and printable electronics, great success has been achieved with OFETs, including flexible displays, photonic sensors and artificial skin.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of naphthalenediimide-thienothiophene-conjugated polymers for OFET and OPT applications

Gunturkun,

Isci,

Faraji

et al. 2023

J. Mater. Chem. C

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Non-fullerene acceptors with alkylthiothiophene side chains for efficient non-halogenated solvent processed indoor organic photovoltaics

Abstract: Organic photovoltaics (OPVs) are regarded as promising energy sources for powering internet of things devices under indoor conditions. Indoor OPVs (IOPVs) have achieved power conversion efficiencies (PCEs) of 25–30%, owing...

Cited by 7 publications

References 72 publications

Eco-Friendly Solvent-Processed Dithienosilicon-Bridged Carbazole-Based Small-Molecule Acceptors Achieved over 25.7% PCE in Ternary Devices under Indoor Conditions

Eco-Friendly Solvent-Processed Dithienosilicon-Bridged Carbazole-Based Small-Molecule Acceptors Achieved over 25.7% PCE in Ternary Devices under Indoor Conditions

Recent developments in non-fullerene-acceptor-based indoor organic solar cells

Synthesis and characterization of naphthalenediimide-thienothiophene-conjugated polymers for OFET and OPT applications

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