Interface design for high-efficiency non-fullerene polymer solar cells

Sun, Chen; Wu, Zhihong; Hu, Zhanhao; Xiao, Jingyang; Zhao, Wenchao; Li, Ho Wa; Li, Qing-Ya; Tsang, Sai‐Wing; Xu, Yun‐Xiang; Zhang, Kai; Yip, Hin‐Lap; Hou, Jianhui; Huang, Fei; Cao, Yong

doi:10.1039/c7ee00601b

Cited by 203 publications

(156 citation statements)

References 37 publications

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“…These non‐fullerene interfacial materials are also effective ETLs for high‐performance OSCs and PVSCs due to their decent electron transporting capabilities, WF tunabilities, as well as solution processability. For instance, NDI‐based conjugated polymer surfactant reported by Huang et al, PNDIT‐F3N‐Br, exhibited self‐doping functionalities between Lewis base anion and NDI moieties, which can be processed through alcohol solvent, and obtained good performance with a broad range of ETL thickness for OSCs, and the doping effect between Lewis base anions and NDI moieties has also been verified by ESR experiments . PDI‐based surfactants also exhibited good conductivities for solar cell applications, which allow fabricating thick ETL layer for good performance .…”

Section: Cathode Interfacial Materials For Organic and Perovskite Solmentioning

confidence: 84%

“…Apart from fullerene‐based conductive interlayers, a series of non‐fullerene interfacial molecules and polymers (shown in Figure ) have been developed, such as perylene diimide (PDI) and naphthalene diimide (NDI) based n‐type semiconductors . These non‐fullerene interfacial materials are also effective ETLs for high‐performance OSCs and PVSCs due to their decent electron transporting capabilities, WF tunabilities, as well as solution processability.…”

Section: Cathode Interfacial Materials For Organic and Perovskite Solmentioning

confidence: 99%

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Solution‐Processable Conductive Organics via Anion‐Induced n‐Doping and Their Applications in Organic and Perovskite Solar Cells

Yan

2019

Macro Chemistry & Physics

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The essential challenge for accessing high‐performance organic optoelectronics strongly relies on how to enable organic materials with high charge transport capabilities. This short review gives an elucidation of the mild n‐doping that occurs between Lewis base anions and n‐semiconductors, as well as their extension to develop solution‐processable conductive interlayers for organic and perovskite solar cells.

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Section: Cathode Interfacial Materials For Organic and Perovskite Solmentioning

confidence: 84%

Section: Cathode Interfacial Materials For Organic and Perovskite Solmentioning

confidence: 99%

Solution‐Processable Conductive Organics via Anion‐Induced n‐Doping and Their Applications in Organic and Perovskite Solar Cells

Yan

2019

Macro Chemistry & Physics

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“…[33] To investigate this effect, photoluminescence (PL) quenching and solar cells based on the PTB7-Th/PF3N-2TNDI heterojunction bilayer film were studied. [33] To investigate this effect, photoluminescence (PL) quenching and solar cells based on the PTB7-Th/PF3N-2TNDI heterojunction bilayer film were studied.…”

Section: Resultsmentioning

confidence: 99%

Synergic Interface and Optical Engineering for High‐Performance Semitransparent Polymer Solar Cells

Shi

Xia

Sun

et al. 2017

Advanced Energy Materials

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both the top and bottom electrodes. These semitransparent PSCs (ST-PSCs) could be used as power generating windows and aesthetic architectural glasses, which are considered as the most appealing photovoltaic product for building integrated photovoltaic applications. [12][13][14][15][16][17][18] However, unlike opaque PSCs, the overall performance of ST-PSCs depends not only on the PCE but also the average visible transmittance (AVT) and color rendering properties. [19] Therefore, the great challenge for ST-PSCs is to achieve high PCE yet with good AVT and color rendering properties.Optimization of both the PCE and AVT in ST-PSCs is inherently challenging as these two performance parameters are difficult to optimize at the same time. The ideal optical condition for ST-PSC can be reached when the light passes through the device is only absorbed by the active layer but not the other layers such as the transparent electrodes and the interlayers, which allows the maximal amount of light transmitted through the devices. The ideal electronic condition for ST-PSC fulfilled if all the photons absorbed by the light harvesting layer can be dissociated and collected to generate photocurrent with internal quantum efficiency equal to 100%. [20] However, in real cases, the optical and electronic properties of the ST-PSCs are strongly affected by the choice of interlayers and transparent electrodes. For example, the interlayer not only can act as a charge selective layer to improve charge extraction in PSCs but also can act as an optical spacer that alters the optical field distribution within the device. [21] Depending on the choice of the transparent conductive material used for constructing the transparent electrode, it can be categorized as nonreflective or semireflective one. The latter case, which can be fabricated using ultrathin metal films (UTMFs) with the reflectance and transmittance depending on the thickness of the metal films, is of particular interest as it provides better flexibility in tuning the optical property of ST-PSCs. [22,23] However, the deposition of high quality and smooth UTMF, which is a prerequisite for achieving high transparency and conductivity, as top transparent conducting electrode for ST-PSCs is not straight forward and the film quality is strongly depending of the choice of underneath charge transport layer and deposition conditions. [24][25][26] In previous reports, tailored charge transport layers, such as a C 60 surfactant as electron transport layer (ETL) and MoS 2 as hole transport layer, had been In this study the thickness of the PTB7-Th:PC 71 BM bulk heterojunction (BHJ) film and the PF3N-2TNDI electron transport layer (ETL) is systematically tuned to achieve polymer solar cells (PSCs) with optimized power conversion efficiency (PCE) of over 9% when an ultrathin BHJ of 50 nm is used. Optical modeling suggests that the high PCE is attributed to the optical spacer effect from the ETL, which not only maximizes the optical field within the BHJ film but also facilitates the formation of a...

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“…For example, if we analyse E HOMO and E LUMO of the derivative P3HTV‐CN‐T ( E HOMO = −5.99 eV and E LUMO = −4.04 eV), we notice that they are very close to those of PCBM ( E HOMO = −6.0 eV and E LUMO = −4.2 eV). This fact shows us that P3HTV‐CN‐T may be a substitute candidate for PCBM as electron acceptor material in active layers of BHJ OSCs, since polymers tend to have better solubility than fullerene derivatives , . Solar cells using active layers composed completely of polymeric materials (both electron acceptor and donor) have already been used in recent years and have shown progress in relation to the efficiencies achieved in the conversion of solar into electric energy , …”

Section: Resultsmentioning

confidence: 99%

Theoretical evaluation of chemical substitutions along the main chain of poly(3‐hexylthienylene‐vinylene) for solar cell applications

Roldao

Oliveira

Sato

et al. 2017

Polymer International

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In order to improve the efficiency of bulk‐heterojunction organic solar cells, one can try to optimize the active layer through the use of new materials that provide improvements in the parameters that influence the final efficiency of a device. The use of chemical substitutions in organic materials already used in these devices seems to be an efficient methodology to obtain new materials with better intrinsic properties. Based on this idea, in this work is investigated theoretically, by methods of electronic structure calculation, a set of 143 poly(3‐hexylthienylene‐vinylene) (P3HTV) derivatives for application in active layers of organic solar cells as electron donor materials; the chemical modifications were performed on the thiophene ring and the vinyl segment of P3HTV. The results show that it is possible to obtain several new derivatives with better optical and electronic properties than those of P3HTV. The derivative substituted with trifluoromethyl on the vinyl segment is one of the most promising for use in active layers, when combined with phenyl‐C61‐butyric‐acid‐methyl‐ester as electron acceptor material. An equation to predict the electronic properties of P3HTV derivatives when using more than one chemical substitution is also proposed, which is corroborated by the theoretical calculations. © 2017 Society of Chemical Industry

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Interface design for high-efficiency non-fullerene polymer solar cells

Abstract: The contact between the n-type interlayer and the donor provides an extra interface for charge dissociation.

Cited by 203 publications

References 37 publications

Solution‐Processable Conductive Organics via Anion‐Induced n‐Doping and Their Applications in Organic and Perovskite Solar Cells

Solution‐Processable Conductive Organics via Anion‐Induced n‐Doping and Their Applications in Organic and Perovskite Solar Cells

Synergic Interface and Optical Engineering for High‐Performance Semitransparent Polymer Solar Cells

Theoretical evaluation of chemical substitutions along the main chain of poly(3‐hexylthienylene‐vinylene) for solar cell applications

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