Broadening the Photoresponse to Near‐Infrared Region by Cooperating Fullerene and Nonfullerene Acceptors for High Performance Ternary Polymer Solar Cells

Li, Jinyan; Líu, Hao; Wang, Zhaoyang; Bai, Yiming; Liu, Lin; Wang, Fuzhi; Hayat, Tasawar; Alsaedi, Ahmed; Tan, Zhan’ao

doi:10.1002/marc.201700492

Cited by 10 publications

(5 citation statements)

References 41 publications

(48 reference statements)

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“…The energy levels of the donor and acceptors in ternary PSCs are shown in Figure b. The lowest unoccupied molecular orbital (LUMO) and the highest occupied molecular orbital (HOMO) levels of PBDTBDD, ITIC, and PC 60 BM are taken from previous reports. − The HOMO of PBDTBDD (−5.32 eV) is only 0.16 eV higher than that of ITIC (−5.48 eV); therefore, the holes produced by ITIC can be rapidly separated and easily transferred to PBDTBDD and finally collected by the anode through the hole-extraction layers. Furthermore, the HOMO of PC 60 BM (−5.90 eV) is much lower than that of PBDTBDD and ITIC, which can effectively block the holes from being transferred back to the cathode, thus greatly suppressing the leakage current and decreasing the energy loss.…”

Section: Results and Discussionmentioning

confidence: 99%

Perfect Complementary in Absorption Spectra with Fullerene, Nonfullerene Acceptors and Medium Band Gap Donor for High-Performance Ternary Polymer Solar Cells

Líu

Xia

et al. 2018

ACS Appl. Mater. Interfaces

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Because of the mismatch between the solar irradiance spectra and the photoactive layer absorption spectra, only a part of sunlight can be utilized, which fundamentally restricting the power conversion efficiency (PCE) of the polymer solar cells (PSCs). Ternary blend PSCs, with an additional third component, have become an effective approach to extend the absorption spectra and increase the mobility of the charge carriers. Herein, we select the middle band gap PBDTBDD as an electron donor and narrow band gap ITIC and wide band gap PCBM as electron acceptors to construct ternary blends for simultaneously enhancing the absorption intensity and expanding the absorption band. The optical properties, morphologies, and the charge-/energy-transfer behaviors of the ternary blends are investigated. By attentively adjusting the ratio of the third component, ITIC, the ternary PSCs demonstrate an expanded light-response region and greatly enhanced J, giving an improved overall PCE of 10.36%, much higher than that of the binary counterparts based on PBDTBDD:PCBM (6.63%) and PBDTBDD:ITIC (9.44%). These findings indicate that proper selection of donors and acceptors to construct absorption spectra-complementary ternary blend photoactive layers is an effective way to achieve high-performance PSCs.

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Section: Results and Discussionmentioning

confidence: 99%

Perfect Complementary in Absorption Spectra with Fullerene, Nonfullerene Acceptors and Medium Band Gap Donor for High-Performance Ternary Polymer Solar Cells

Líu

Xia

et al. 2018

ACS Appl. Mater. Interfaces

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“…By contrast, the incorporation of ITIC provides more charge transmission channels for charge transport to suppress recombination. Tan et al 119 also employed cathode engineering in ternary devices to improve device efficiency. The ternary OPV PBDTBDD: PC 71 BM: IEICO with zirconium acetylacetonate (ZrAcac) was used as the cathode buffer layer and achieved a PCE of 10.51%.…”

Section: Incorporation Of Nfas Into Fullerene-based Binary Systems Enhancing Optical Absorptionmentioning

confidence: 99%

High-Performance Ternary Organic Solar Cells Enabled by Synergizing Fullerene and Non-fullerene Acceptors

Jiang

Zhu

2021

Organic Materials

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With the development of the non-fullerene acceptor (NFA), the use of ternary organic photovoltaic devices based on a fullerene acceptor and a NFA is now widespread, and the merits of both acceptor types can be fully utilized. However, the effective approach of enhancing device performance is adjusting the charge dynamics and the thin-film morphology of the active layer via introducing the second acceptor, which would significantly impact the open-circuit voltage, the short-circuit current, and the fill factor, thus strongly affecting device efficiency. The functions of the second acceptor in a ternary organic solar cell with a fullerene acceptor and a NFA are summarized here. These include a broader absorption spectrum; formation of a cascade energy level or energy transfer; modified thin-film morphology including phase separation, effects on crystallinity, size, and purity of domain; and vertical distribution along with improved charge dynamics like exciton dissociation and charge transport, collection, and recombination. Then, we discuss the hierarchical morphology in ternary solar cells may benefit device performance and the outlook of the ternary device.

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“…Fullerene derivatives were regarded as a promising electronic transport layer (ETL) material due to their distinguished advantages of high electron mobility and good energy level matching with the active layers of OSCs . The polarities of the fullerene derivatives were influenced significantly by the presence of functional groups, such as sulfonate, ether chain, ester, and carboxylic acid A few fullerene derivatives with functionalized anchoring groups have been developed as a modification layer of metal oxide in inverted OSCs .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of Functionalized Diblock Amphiphilic Fullerene Derivatives

Liu

et al. 2019

Macro Chemistry & Physics

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A series of functionalized amphiphilic diblock fullerene derivatives C60‐4TPB, C60‐2DPE, C60‐4HTPB, C60‐PHFBS, and C60‐2BEFPE are developed and applied as the modification layers on zinc oxide (ZnO) in inverted organic solar cell (OSC) devices. By spin‐coating ZnO, the fullerene derivatives layer can reduce the work function of ZnO via modulation of the interfacial dipoles. When introducing solvent treatment by toluene during the preparation of films, the order of the fullerene derivatives layer are clearly increased, which are supported by X‐ray diffraction and contact angle of water measurements. The OSCs devices modified with those fullerene derivatives show power conversion efficiency of 8.62%, 9.21%, 8.86%, 9.14%, and 9.15% based on poly‐[4,8‐bis(5‐(2‐ethylhexyl)‐thiophen‐2‐yl)benzo[1,2‐b:4,5‐b′]‐dithiophene‐alt‐3‐fluoro thieno‐[3,4‐b] thiophene‐2‐carboxylate] (PTB7‐Th) and [6,6]‐phenyl‐C71‐butyric acid methyl ester (PC71BM) blend, respectively. All the results indicate that the development of diblock amphiphilic fullerene derivatives opens a new opportunity to modify the present defects of ZnO by simultaneously modulating interfacial work functions, the wetting properties of the interlayer, and the active layer.

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Broadening the Photoresponse to Near‐Infrared Region by Cooperating Fullerene and Nonfullerene Acceptors for High Performance Ternary Polymer Solar Cells

Cited by 10 publications

References 41 publications

Perfect Complementary in Absorption Spectra with Fullerene, Nonfullerene Acceptors and Medium Band Gap Donor for High-Performance Ternary Polymer Solar Cells

Perfect Complementary in Absorption Spectra with Fullerene, Nonfullerene Acceptors and Medium Band Gap Donor for High-Performance Ternary Polymer Solar Cells

High-Performance Ternary Organic Solar Cells Enabled by Synergizing Fullerene and Non-fullerene Acceptors

Synthesis and Application of Functionalized Diblock Amphiphilic Fullerene Derivatives

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