High efficiency inverted polymer solar cells with room-temperature titanium oxide/polyethylenimine films as electron transport layers

Yang, Dong; Fu, Ping; Zhang, Fujun; Wang, Nan; Zhang, Jian; Li, Can

doi:10.1039/c4ta03838j

Cited by 69 publications

(54 citation statements)

References 43 publications

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“…For comparison, OPV devices with the conventional structure of ITO/PEDOT:PSS/small molecule:PC 71 BM (2:1)/LiF/Al were also fabricated; however, they showed no photovoltaic properties due to the protonation of the pyridyl nitrogen by acidic PEDOT:PSS. Such phenomena were reported in previous reports on pyridine‐based polymer or small molecular donors, in which device performance was successfully improved by introducing the inverted structure …”

Section: Resultsmentioning

confidence: 99%

TPD‐ and DPP‐based Small Molecule Donors Containing Pyridine End Groups for Organic Photovoltaic Cells

Kim

Song

Lee

et al. 2016

Bulletin Korean Chem Soc

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We synthesized two new thieno [3,4-c]pyrrole-4,6-dione (TPD)-and diketopyrrolopyrrole (DPP)-based small molecules having pyridine end groups, TPDTPy and DPPTPy, using the Stille and Suzuki coupling reactions, respectively. The optical, electrochemical, and photovoltaic properties of these small molecules depended on the introduced electron-accepting units of TPD and DPP. DPPTPy exhibited a relatively low-energy bandgap (E g ) of 1.82 eV compared to TPDTPy (2.22 eV) because of the stronger electron-withdrawing ability of DPP compared to TPD. Organic photovoltaic cells with the inverted ITO/ZnO/small molecule:(6,6)-phenyl-C 71 -butyric acid methyl ester/MoO 3 /Ag structure were fabricated. The DPPTPy-based device showed a relatively high power conversion efficiency of 0.62% compared to TPDTPy (0.16%), mainly because of the red-shifted UV absorption, lower E g , and the higher short-circuit current of DPPTPy.

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Section: Resultsmentioning

confidence: 99%

TPD‐ and DPP‐based Small Molecule Donors Containing Pyridine End Groups for Organic Photovoltaic Cells

Kim

Song

Lee

et al. 2016

Bulletin Korean Chem Soc

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“…Moreover, PEI shows good compatibility with other metal oxides to form bilayer hybrid cathode IFLs. Recently, Li et al, reported TiOx/PEI film as the electron transporting layer for high-performance PSCs, the resulting PTB7:PC71BM inverted cells achieve an average PCE of 8.72% with a champion value of 9.08%, which is much greater than that (7.38%) from the control cells using TiOx IFL [74].…”

Section: Water/alcohol Soluble Conjugated Polymersmentioning

confidence: 90%

Interfacial Layer Engineering for Performance Enhancement in Polymer Solar Cells

et al. 2015

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Improving power conversion efficiency and device performance stability is the most critical challenge in polymer solar cells for fulfilling their applications in industry at large scale. Various methodologies have been developed for realizing this goal, among them interfacial layer engineering has shown great success, which can optimize the electrical contacts between active layers and electrodes and lead to enhanced charge transport and collection. Interfacial layers also show profound impacts on light absorption and optical distribution of solar irradiation in the active layer and film morphology of the subsequently deposited active layer due to the accompanied surface energy change. Interfacial layer engineering enables the use of high work function metal electrodes without sacrificing device performance, which in combination with the favored kinetic barriers against water and oxygen penetration leads to polymer solar cells with enhanced performance stability. This review provides an overview of the recent progress of different types of interfacial layer materials, including polymers, small molecules, graphene oxides, fullerene derivatives, and metal oxides. Device performance enhancement of the resulting solar cells will be elucidated and the function and operation mechanism of the interfacial layers will be discussed. OPEN ACCESSPolymers 2015, 7 334

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“…Organic solar cells (OSCs) have attracted more and more attention since their low cost, low weight, semitransparent [1][2][3][4][5][6][7][8][9][10][11]. The anode interface layer (AIL) serves as a selective contact by extracting holes while concurrently blocking electrons is widely used in all OSCs devices to reduce the leakage current and enhance the open circuit voltage [12,13].…”

Section: Introductionmentioning

confidence: 99%

A wide temperature tolerance, solution-processed MoOx interface layer for efficient and stable organic solar cells

Cai

Zhang

et al. 2017

Solar Energy Materials and Solar Cells

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High efficiency inverted polymer solar cells with room-temperature titanium oxide/polyethylenimine films as electron transport layers

Cited by 69 publications

References 43 publications

TPD‐ and DPP‐based Small Molecule Donors Containing Pyridine End Groups for Organic Photovoltaic Cells

TPD‐ and DPP‐based Small Molecule Donors Containing Pyridine End Groups for Organic Photovoltaic Cells

Interfacial Layer Engineering for Performance Enhancement in Polymer Solar Cells

A wide temperature tolerance, solution-processed MoOx interface layer for efficient and stable organic solar cells

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