Enhanced performance of polymer solar cells based on PTB7-Th:PC<sub>71</sub>BM by doping with 1-bromo-4-nitrobenzene

Fan, Rui Qing; Huai, Zhaoxiang; Sun, Yansheng; Li, Xiaowei; Fu, Guangsheng; Huang, Shahua; Wang, Lixin; Yang, Shaopeng

doi:10.1039/c7tc04062h

Cited by 23 publications

(15 citation statements)

References 32 publications

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“…Representative current density‐voltage ( J – V ) curves of the fabricated OSCs with increasing amounts of CsPbI 3 (from 0 wt % to 3 wt %) are shown in Figure a, and the averaged device performance parameters for QD loading up to 10 wt % are summarized in Table and the Supporting Information, Figure S4 along with the top performance (PCE max ) at each loading condition. The standard binary device (0 wt %) shows an average PCE around 8 %, in agreement with the state‐of‐the‐art performance of the PTB7‐Th:PC 71 BM blend, especially when considering our relatively large active area (0.16 cm 2 ) . It is observed that the PCE of ternary devices increases with the incorporation of CsPbI 3 QDs peaking at 3 wt % with a remarkable average efficiency of 10.53 % (best cell 10.84 %).…”

Section: Resultssupporting

confidence: 80%

Lead Halide Perovskite Quantum Dots To Enhance the Power Conversion Efficiency of Organic Solar Cells

et al. 2019

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The facile synthesis, solution‐processability, and outstanding optoelectronic properties of emerging colloidal lead halide perovskite quantum dots (LHP QDs) makes them ideal candidates for scalable and inexpensive optoelectronic applications, including photovoltaic (PV) devices. The first demonstration of integrating CsPbI3 QDs into a conventional organic solar cell (OSC) involves embedding the LHP QDs in a donor–acceptor (PTB7‐Th:PC71BM) bulk heterojunction. Optimizing the loading amount at 3 wt %, we demonstrate a power conversion efficiency of 10.8 %, which is a 35 % increase over control devices, and is a record amongst hybrid ternary OSCs. Detailed investigation into the mechanisms behind the performance enhancement shows that increased light absorption is not a factor, but that increased exciton separation in the acceptor phase and reduced recombination are responsible.

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Section: Resultssupporting

confidence: 80%

Lead Halide Perovskite Quantum Dots To Enhance the Power Conversion Efficiency of Organic Solar Cells

et al. 2019

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“…When 2% v/v GO-TNF ink was added, PL intensity quenching is significant owing to the better energy offset between the LUMO levels of PTB7 and GO-TNF that enhances the charge transfer mechanism. In our case, the incorporation of GO-TNF ink with an optimum concentration of 2% v/v, facilitates exciton dissociation at the PTB7:PC71BM interface thus leading to a higher number of electrons that can be collected by the cathode, which is in agreement with the champion current density value achieved so far (17.65 mA cm -2 ) [25]. Figure 6.…”

Section: Photoluminescence (Pl) Spectroscopysupporting

confidence: 88%

Emphasizing the Operational Role of a Novel Graphene-Based Ink into High Performance Ternary Organic Solar Cells

Stylianakis

Kosmidis

Anagnostou

et al. 2019

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A novel solution-processed graphene-based material was synthesized by treating graphene oxide (GO) with 2,5,7-trinitro-9-oxo-fluorenone-4-carboxylic acid (TNF-COOH) moieties, via simple synthetic routes. The yielded molecule N-[(carbamoyl-GO)ethyl]-N’-[(carbamoyl)-(2,5,7-trinitro-9-oxo-fluorene)] (GO-TNF) was thoroughly characterized and it was shown that it presents favorable highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels to function as a bridge component between the polymeric donor poly({4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-b]thiophenediyl}) (PTB7) and the fullerene derivative acceptor [6,6]-phenyl-C71-butyric-acid-methylester (PC71BM). In this context, a GO-TNF based ink was prepared and directly incorporated within the binary photoactive layer, in different volume ratios (1-3% ratio to the blend), for the effective realization of inverted ternary organic solar cells (OSCs) of the structure ITO/PFN/PTB7:GO-TNF:PC71BM/MoO3/Al. The addition of 2% v/v GO-TNF ink led to a champion power conversion efficiency (PCE) of 8.71% that was enhanced by ~13% as compared to the reference cell.

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“…Fan et al [111] introduced a solid (melting point, m.p. = 125 °C) fluorescent inhibitor (1-bromo-4-nitrobenzene) into the PTB7:PC 71 BM BHJs to improve device efficiency.…”

Section: Devices Based On Ptb7-thmentioning

confidence: 99%

Recent Developments in the Optimization of the Bulk Heterojunction Morphology of Polymer: Fullerene Solar Cells

et al. 2018

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Organic photovoltaic (OPV) devices, made with semiconducting polymers, have recently attained a power conversion efficiency (PCE) over 14% in single junction cells and over 17% in tandem cells. These high performances, together with the suitability of the technology to inexpensive large-scale manufacture, over lightweight and flexible plastic substrates using roll-to-roll (R2R) processing, place the technology amongst the most promising for future harvesting of solar energy. Although OPVs using non-fullerene acceptors have recently outperformed their fullerene-based counterparts, the research in the development of new fullerenes and in the improvement of the bulk-heterojunction (BHJ) morphology and device efficiency of polymer:fullerene solar cells remains very active. In this review article, the most relevant research works performed over the last 3 years, that is, since the year 2016 onwards, in the field of fullerene-based polymer solar cells based on the copolymers PTB7, PTB7-Th (also known as PBDTTT-EFT) and PffBT4T-2OD, are presented and discussed. This review is primarily focused on studies that involve the improvement of the BHJ morphology, efficiency and stability of small active area devices (typically < 15 mm2), through the use of different processing strategies such as the use of different fullerene acceptors, different processing solvents and additives and different thermal treatments.

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Enhanced performance of polymer solar cells based on PTB7-Th:PC₇₁BM by doping with 1-bromo-4-nitrobenzene

Abstract: A fluorescence inhibitor 1-bromo-4-nitrobenzene was introduced into the PTB7-Th:PC71BM active layer to prepare an organic solar cell that exhibited a high PCE of 8.95%.

Cited by 23 publications

References 32 publications

Lead Halide Perovskite Quantum Dots To Enhance the Power Conversion Efficiency of Organic Solar Cells

Lead Halide Perovskite Quantum Dots To Enhance the Power Conversion Efficiency of Organic Solar Cells

Emphasizing the Operational Role of a Novel Graphene-Based Ink into High Performance Ternary Organic Solar Cells

Recent Developments in the Optimization of the Bulk Heterojunction Morphology of Polymer: Fullerene Solar Cells

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Enhanced performance of polymer solar cells based on PTB7-Th:PC71BM by doping with 1-bromo-4-nitrobenzene

Abstract: A fluorescence inhibitor 1-bromo-4-nitrobenzene was introduced into the PTB7-Th:PC71BM active layer to prepare an organic solar cell that exhibited a high PCE of 8.95%.

Cited by 23 publications

References 32 publications

Lead Halide Perovskite Quantum Dots To Enhance the Power Conversion Efficiency of Organic Solar Cells

Lead Halide Perovskite Quantum Dots To Enhance the Power Conversion Efficiency of Organic Solar Cells

Emphasizing the Operational Role of a Novel Graphene-Based Ink into High Performance Ternary Organic Solar Cells

Recent Developments in the Optimization of the Bulk Heterojunction Morphology of Polymer: Fullerene Solar Cells

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Enhanced performance of polymer solar cells based on PTB7-Th:PC₇₁BM by doping with 1-bromo-4-nitrobenzene