Highly efficient near-infrared and semitransparent polymer solar cells based on an ultra-narrow bandgap nonfullerene acceptor

Chen, Juan; Li, Guangda; Zhu, Qinglian; Guo, Xia; Fan, Qunping; Ma, Wei; Zhang, Maojie

doi:10.1039/c8ta11484f

Cited by 92 publications

(72 citation statements)

References 61 publications

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“…Reprinted with permission. [59] Copyright 2019, Royal Societyof Chemistry. and acceptorm aterials, ah igh PCE of 11.4 %w as obtained for OSCs with al arge device area of 1cm 2 ,a nd ah igh PCEo f 12.2 %w as also obtained for OSCs with an active layer thickness of up to 285 nm (Figure4c);this indicates that fluorinated PM6:IT-4F is an ideal candidate for the roll-to-roll production of efficient OSCs in the future.…”

Section: Fluorinated Sm Acceptorsmentioning

confidence: 99%

“…[58] Its OSCs achieved an impressive J sc of 25.3 mA cm À2 ,d espite energy losses as lowa s 0.509 eV.Z hang et al synthesized another ultranarrow band gap (1.30 eV) SM acceptor,A CS8, by introducing alkylthio substituents into the thienyl bridges. [59] Matching with PTB7-Th, its OSCs achieved aP CE of 13.2 %, and the corresponding semitransparent OSCs exhibiteda no utstanding PCE of 11.1 % under an averagev isible transmittanceo f2 8.6 % ( Figure 4d). Different from typical SM acceptors with af used core, Chen et al developed aS Ma cceptor,H C-PCIC, with ad ifluorinated unfusedc ore. [60] Matching with fluorinated PTQ10, its OSCs achievedaPCE of 10.42 %, although the HOMO offset was near zero.…”

Section: Fluorinated Sm Acceptorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Zhang et al. synthesized another ultranarrow band gap (1.30 eV) SM acceptor, ACS8, by introducing alkylthio substituents into the thienyl bridges . Matching with PTB7‐Th, its OSCs achieved a PCE of 13.2 %, and the corresponding semitransparent OSCs exhibited an outstanding PCE of 11.1 % under an average visible transmittance of 28.6 % (Figure d).…”

Section: Introductionmentioning

confidence: 99%

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Fluorinated Photovoltaic Materials for High‐Performance Organic Solar Cells

Fan

Méndez‐Romero

Guo

et al. 2019

Chemistry An Asian Journal

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Over the past decade, organic solar cells (OSCs) have achieved a dramatic boost in their power conversion efficiencies from about 6 % to over 16 %. In addition to developments in device engineering, innovative photovoltaic materials, especially fluorinated donors and acceptors, have become the dominant factor for improved device performance. This minireview highlights fluorinated photovoltaic materials that enable efficient OSCs. Impressive OSCs have been obtained by developing some important molds of fluorinated donor and acceptor systems. The molecular design strategy and the matching principle of fluorinated donors and acceptors in OSCs are discussed. Finally, a concise summary and outlook are presented for advances in fluorinated materials to realize the practical application of OSCs.

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Section: Fluorinated Sm Acceptorsmentioning

confidence: 99%

Section: Fluorinated Sm Acceptorsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fluorinated Photovoltaic Materials for High‐Performance Organic Solar Cells

Fan

Méndez‐Romero

Guo

et al. 2019

Chemistry An Asian Journal

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“…Although the relatively high PCEs have been obtained for A‐D‐A NFAs‐based PSCs, it is still a challenge to achieve a high V oc and a large J sc simultaneously, which is important for further improving PSCs performance . As known, the V oc of PSCs is proportional to the difference between the lowest unoccupied molecular orbital (LUMO) of acceptor and the highest occupied molecular orbital (HOMO) of donor, and the J sc is related to the absorption and charge mobility of blend film . Therefore, precisely tuning the energy levels and optical bandgaps (

E_{normalg}^{opt}

) of donor and acceptor is important for achieving high V oc and large J sc simultaneously …”

Section: Introductionmentioning

confidence: 99%

A Novel Carbazole‐Based Nonfullerene Acceptor for High‐Efficiency Polymer Solar Cells

et al. 2019

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It is important to tune the energy levels of nonfullerene acceptors (NFAs) to achieve more balanced open‐circuit voltage (Voc) and short‐circuit current density (Jsc) to improve the device performance. Herein, two novel NFAs are designed via fusing fluorene or carbazole with two thieno[3,2‐b]thiophene and end capped with INIC‐2F, namely, 4TFIC‐4F and 4TCIC‐4F, respectively. The impact of the fluorene and carbazole unit on the PSC performance is systematically studied. Compared with 4TFIC‐4F, 4TCIC‐4F exhibits a higher lowest unoccupied molecular orbital (LUMO) energy level of −3.95 eV and a narrower optical bandgap of 1.51 eV owing to the stronger electron‐donating capacity of fused‐carbazole ring core. Consequently, the 4TCIC‐4F device achieves a high power conversion efficiencies (PCE) of 13.02% with a higher Voc of 0.94 V and a larger Jsc of 18.98 mA cm−2, whereas the 4TFIC‐4F device shows a PCE of 11.24%. The PCE of 13.02% is the highest value so far reported with the carbazole‐containing NFAs‐based PSCs. More importantly, the 4TCIC‐4F device shows good film thickness insensitive and long‐term thermal stability. The investigation demonstrates that the fused‐carbazole ring is a superior option to fused‐fluorene ring as electron‐donating core for designing high‐performance NFAs by improving Voc and Jsc simultaneously.

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Over 15% Efficiency Polymer Solar Cells Enabled by Conformation Tuning of Newly Designed Asymmetric Small‐Molecule Acceptors

Guo

et al. 2020

Adv Funct Materials

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The prosperous period of polymer solar cells (PSCs) has witnessed great progress in molecule design methods to promote power conversion efficiency (PCE). Designing asymmetric structures has been proved effective in tuning energy level and morphology, which has drawn strong attention from the PSC community. Two hepta-ring and octa-ring asymmetric small molecular acceptors (SMAs) (IDTP-4F and IDTTP-4F) with S-shape and C-shape confirmations are developed to study the relationship between conformation shapes and PSC efficiencies. The similarity of absorption and energy levels between two SMAs makes the conformation a single variable. Additionally, three wide-bandgap polymer donors (PM6, S1, and PM7) are chosen to prove the universality of the relationship between conformation and photovoltaic performance. Consequently, the champion PCE afforded by PM7: IDTP-4F is as high as 15.2% while that of PM7: IDTTP-4F is 13.8%. Moreover, the S-shape IDTP-4F performs obviously better than their IDTTP-4F counterparts in PSCs regardless of the polymer donors, which confirms that S-shape conformation performs better than the C-shape one. This work provides an insight into how conformations of asymmetric SMAs affect PCEs, specific functions of utilizing different polymer donors to finely tune the active-layer morphology and another possibility to reach an excellent PCE over 15%.

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Highly efficient near-infrared and semitransparent polymer solar cells based on an ultra-narrow bandgap nonfullerene acceptor

Abstract: Non-fullerene polymer solar cells based on a low bandgap polymer PTB7-Th and an ultra-narrow bandgap acceptor ACS8 exhibited an optimal PCE of 13.2%, indicating that the blend of PTB7-Th/ACS8 has potential for the practical applications of PSCs.

Cited by 92 publications

References 61 publications

Fluorinated Photovoltaic Materials for High‐Performance Organic Solar Cells

Fluorinated Photovoltaic Materials for High‐Performance Organic Solar Cells

A Novel Carbazole‐Based Nonfullerene Acceptor for High‐Efficiency Polymer Solar Cells

Over 15% Efficiency Polymer Solar Cells Enabled by Conformation Tuning of Newly Designed Asymmetric Small‐Molecule Acceptors

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