High-efficiency organic solar cells with low voltage loss induced by solvent additive strategy

Song, Jinsheng; Zhu, Lei; Li, Chao; Xu, Jinqiu; Wu, Hongbo; Zhang, Xuning; Zhang, Yuan; Tang, Zheng; Liu, Feng; Sun, Yanming

doi:10.1016/j.matt.2021.06.010

Cited by 165 publications

(108 citation statements)

References 54 publications

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“…The power conversion efficiency (PCE) of OSCs has been improved rapidly since the development of non-fullerene acceptor (NFA) materials 4,5 . Today, the highest PCE values reported for OSCs based on the NFA are over 18% [6][7][8] . Typically, the donor materials used in the state-of-the-art NFA OSCs are synthesized based on the donor-acceptor push-pull concept 9,10 .…”

Section: Introductionmentioning

confidence: 99%

Quantum Efficiency and Voltage Losses in P3HT: Non-fullerene Solar Cells

Xu¹,

Wu²,

Liang³

et al. 2022

Acta Physico Chimica Sinica

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From the industrial perspective, poly(3-hexylthiophene) (P3HT) is one of the most attractive donor materials in organic photovoltaics. The large bandgap in P3HT makes it particularly promising for efficient indoor light harvesting, a unique advantage of organic photovoltaic (PV) devices, and this has started to gain considerable attention in the field of PV technology. In addition, the up-scalability and long material stability associated with the simple chemical structure make P3HT one of the most promising materials for the mass production of organic solar cells. However, the solar cells based on P3HT has a low power conversion efficiency (PCE), which is less than 11%, mainly due to significant voltage losses. In this study, we identified the origin of the high quantum efficiency and voltage losses in the P3HT:non-fullerene based solar cells, and we proposed a strategy to reduce the losses. More specifically, we observed that: 1) the non-radiative decay rate of the charge transfer (CT) states formed at the donor-acceptor interfaces was much higher for the P3HT:nonfullerene solar cells than that for the P3HT:fullerene solar cells, which was the main reason for the more severely limited photovoltage; 2) the origin of the high non-radiative decay rate in the P3HT:non-fullerene solar cell could be ascribed to the short packing distance between the P3HT and non-fullerene acceptor molecules at the donor-acceptor interfaces (DA distance), which is a rarely studied interfacial structural property, highly important in determining the decay rate of CT states; 3) the lower voltage loss in the state-of-the-art P3HT solar cell based on the 2,2'- ((12,13-bis(2-butyldecyl)-3,9diundecyl-12,13-dihydro-[1,2,5]-thiadiazolo[3,4-e]thieno[2'',3'':4',5']thieno[2',3':4,5]p-yrolo[3,2-g]thieno [2',3':4,5]thieno [3,2b]indole-2,10-diyl)bis(methanelylidene))bis(5,6-dichloro-1H-indene-1,3(2H)-dion-e) (ZY-4Cl) acceptor could be associated with the better alignment of the energy levels of the active materials and the longer DA distance, compared to those based on the commonly used acceptors. However, the DA distance was still very short, limiting the device voltage. Thus, improving the performance of the P3HT based solar cells requires a further increase in the DA distance. Our findings are expected to pave the way for breaking the performance bottleneck of the P3HT based solar cells.

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Section: Introductionmentioning

confidence: 99%

Quantum Efficiency and Voltage Losses in P3HT: Non-fullerene Solar Cells

Xu¹,

Wu²,

Liang³

et al. 2022

Acta Physico Chimica Sinica

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“…5 Recently there has been a significant increase in record power conversion efficiencies (PCEs), exceeding 18% for single junction devices. [6][7][8] This is mainly due to the development of strongly absorbing acceptor molecules, however, these molecules are normally produced via multi-step synthesis and are therefore quite expensive to produce. The development of efficient small-scale laboratory fabricated devices has prompted a shift towards large-scale devices which could potentially be used for commercial purposes.…”

Section: Introductionmentioning

confidence: 99%

“…42 There are several active materials that have been shown to reach high performances, with some reaching beyond 18% for single junction OPVs. [6][7][8] However, most of these high performing materials were only fabricated into small-scale cells using rigid glass substrate, and the deposition process was protected by nitrogen, which is not easily applicable to large-scale printing/ coating method. As of 2021, the highest efficiency to be achieved for large area (Z1 cm 2 ) OPVs has been 12.6%.…”

Section: Introductionmentioning

confidence: 99%

Introducing neat fullerenes to improve the thermal stability of slot-die coated organic solar cells

et al. 2022

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“…OSCs consist of an anode, cathode and active layer. By 2021, thanks to the favorable development of donor and acceptor materials, optimization of active layer morphology and maturity of processing technology, the OSCs have realized outstanding power conversion efficiency (PCE), over 18% for binary devices [5][6][7][8][9][10][11][12]. These devices based on a ternary active layer can achieve the same or better performance [13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the ODT avoids excessive crystallization of the donor, which makes the crystallinity more balanced. [6,6]-phenyl C71-butyric acid methyl ester (PC71BM) blends [91]. The filmforming duration increased from 46 s to >1800 s after the addition of DIO (Figure 6a).…”

Section: Introductionmentioning

confidence: 99%

Recent Advances of Film–Forming Kinetics in Organic Solar Cells

Liang

Yao

et al. 2021

Energies

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Solution–processed organic solar cells (OSC) have been explored widely due to their low cost and convenience, and impressive power conversion efficiencies (PCEs) which have surpassed 18%. In particular, the optimization of film morphology, including the phase separation structure and crystallinity degree of donor and acceptor domains, is crucially important to the improvement in PCE. Considering that the film morphology optimization of many blends can be achieved by regulating the film–forming process, it is necessary to take note of the employment of solvents and additives used during film processing, as well as the film–forming conditions. Herein, we summarize the recent investigations about thin films and expect to give some guidance for its prospective progress. The different film morphologies are discussed in detail to reveal the relationship between the morphology and device performance. Then, the principle of morphology regulating is concluded with. Finally, a future controlling of the film morphology and development is briefly outlined, which may provide some guidance for further optimizing the device performance.

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High-efficiency organic solar cells with low voltage loss induced by solvent additive strategy

Cited by 165 publications

References 54 publications

Quantum Efficiency and Voltage Losses in P3HT: Non-fullerene Solar Cells

Quantum Efficiency and Voltage Losses in P3HT: Non-fullerene Solar Cells

Introducing neat fullerenes to improve the thermal stability of slot-die coated organic solar cells

Recent Advances of Film–Forming Kinetics in Organic Solar Cells

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