Recent progress in organic solar cells (Part I material science)

Liu, Yahui; Li, Bowen; Ma, Chang‐Qi; Huang, Fei; Feng, Guitao; Chen, Hongzheng; Hou, Jianhui; Yan, Lingpeng; Wei, Qiuping; Luo, Qun; Bao, Qinye; Ma, Wei; Liu, Wei; Li, Weiwei; Wan, Xiangjian; Hu, Xiaotian; Han, Yanchun; Li, Yaowen; Zhou, Yinhua; Zou, Yingping; Chen, Yiwang; Li, Yongfang; Chen, Yongsheng; Tang, Zheng; Hu, Zhicheng; Zhang, Zhiguo; Bo, Zhishan

doi:10.1007/s11426-021-1180-6

Cited by 462 publications

(212 citation statements)

References 402 publications

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“…V is another critical parameter determining Knr, according to Equation (8). In the generalized Mulliken-Hush (GMH) theory, V increases with increasing transition dipole moment (M) and reducing static dipole moment (µCT) of the CT state 50,51 :…”

Section: High Vloss In Oscs Based On P3ht:nfamentioning

confidence: 99%

“…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%

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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: High Vloss In Oscs Based On P3ht:nfamentioning

confidence: 99%

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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“…Among the emerging photovoltaic technologies, OSCs are ideal candidates for low‐cost and flexible photovoltaic technology with the capability of large area manufacturing through solution processing 7–9 . In the past two decades, researchers around the world have made tremendous efforts on device engineering and optimizing the chemical structure of organic semiconductors 10–12 . These efforts resulted in a dramatic improvement in power conversion efficiency (PCE) from 1% to 18% for OSCs, 13‐15 thus making the commercialization of OSCs more promising.…”

Section: Introductionmentioning

confidence: 99%

Perylene‐diimide‐based cathode interlayer materials for high performance organic solar cells

Jia

Chen

Zhang

et al. 2022

SusMat

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Organic solar cells (OSCs), benefiting from their significant advantages, such as light weight, flexibility, low cost, and large area manufacturing adaptability, are considered promising clean energy technologies. Currently, the power conversion efficiency (PCE) of state-of-the-art OSCs has reached over 18% through materials and device engineering. Specifically, cathode engineering with cathode interlayer materials (CIMs) is an important strategy to improve the PCEs and stability of OSCs. Among various CIMs reported in the literature, perylene diimides (PDIs) are more appropriate for working as cathode interlayers in OSCs owing to their distinct advantages of suitable energy levels, high electron affinity, high electron mobility, and facile modification. In this review, the mechanism of cathode engineering is concisely summarized, and recent research progress on PDI derivatives working as CIMs in OSCs is systematically reviewed. Finally, prospects and suggestions are provided for the development of PDI-based CIMs for practical applications.

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“…14–18 Due to the rapid development of novel organic donor and acceptor materials, the power conversion efficiencies (PCEs) of opaque BHJ OSCs have broken through 18%. 19–24 The BHJ layer requires that the donor and acceptor are blended in a suitable ratio and form nanoscale phase separation for efficient exciton dissociation and charge collection, in which it is difficult to adjust the absorption of the donor and acceptor independently. Two-step sequential deposition (SD) of the donor and acceptor has been used to fabricate OSCs since the donor layer and acceptor layer can be optimized independently.…”

Section: Introductionmentioning

confidence: 99%