Efficient organic photovoltaics using solution-processed, annealing-free TiO2 nanocrystalline particles as an interface modification layer

Xiong, Jian; Yang, Bingchu; Yuan, Jun; Fan, Ling; Hu, Xu; Xie, Haipeng; Lyu, Lu; Cui, Ruili; Zou, Yingping; Zhou, Conghua; Niu, Dongmei; Gao, Yongli; Yang, Junliang

doi:10.1016/j.orgel.2014.12.023

Cited by 46 publications

(14 citation statements)

References 45 publications

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“…Benzo[1,2‐ b :4,5‐ b ′]‐dithiophene (BDT) based polymers have gained attention among the organic semiconducting materials due to their good optoelectronic properties and their ability to be modified to tune their solubility and band gap . BDT polymers can be used in organic field‐effect transistors (OFETs), sensors, and organic photovoltaic applications, such as solar cells and organic light emitting diodes (OLEDs) . BDT polymers are a group of widely studied fused‐ring polymers .…”

Section: Introductionmentioning

confidence: 99%

Effect of thiophene spacers in benzodithiophene‐based polymers for organic electronics

Pathiranage

Magurudeniya

Stefan

2017

J. Polym. Sci. Part A: Polym. Chem.

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Poly{2,6‐bis(thiophene‐2‐yl)‐4,8‐bis(5‐dodecylthiophen‐2‐yl)benzo[1,2‐b:4,5‐b']dithiophene} [poly(Th‐bDTBDT‐Th)] was successfully synthesized through Stille coupling polymerization. The addition of the thiophene spacer groups between the benzodithiophene units resulted in improved performance in optoelectronic devices. This was attributed to the reduced lamellae stacking distance in thin film with prominent π–π stacking peak indicating close assembly of poly(Th‐bDTBDT‐Th). Spacing between the benzodithiophene units in poly(Th‐bDTBDT‐Th) helped the close packing of dodecyl chains and generated improved π stacking interaction. For poly(Th‐bDTBDT‐Th), the measured average field effect mobility was 2.32 × 10−3 cm2 V−1 s−1 and average hole mobility in vertical direction was 2.92 × 10−5 cm2 V−1 s−1. Charge transport in both directions was improved by one order of magnitude with the presence of the thiophene spacer. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3942–3948

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Section: Introductionmentioning

confidence: 99%

Effect of thiophene spacers in benzodithiophene‐based polymers for organic electronics

Pathiranage

Magurudeniya

Stefan

2017

J. Polym. Sci. Part A: Polym. Chem.

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“…[1][2][3][4][5][6][7] In recent years, organic optoelectronic application has been one of the active research areas because of the fascinating photodetection or photoconducting characteristics in a wide wavelength region. [1][2][3][4][5][6][7] In recent years, organic optoelectronic application has been one of the active research areas because of the fascinating photodetection or photoconducting characteristics in a wide wavelength region.…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Organic Heterojunction Phototransistors Based on Highly Ordered Copper Phthalocyanine/para‐Sexiphenyl Thin Films

Qian

Sun

Kong

et al. 2016

Adv Funct Materials

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High‐performance organic heterojunction phototransistors are fabricated using highly ordered copper phthalocyanine (CuPc) and para‐sexiphenyl (p‐6P) thin films. The p‐6P thin film plays an important role on the performance of CuPc/p‐6P heterojunction phototransistors. It acts as a molecular template layer to induce the growth of highly ordered CuPc thin film, which dramatically improves the charge transport and decreases the grain boundaries. On the other hand, the p‐6P thin film can form an effective heterojunction with CuPc thin film, which is greatly helpful to enhance the light absorption and photogenerated carriers. Under 365 nm ultraviolet light irradiation, the ratio of photocurrent and dark current and photoresponsivity of CuPc/p‐6P heterojunction phototransistors reaches to about 2.2 × 104 and 4.3 × 102 A W−1, respectively, which are much larger than that of CuPc phototransistors of about 2.7 × 102 and 7.3 A W−1, respectively. A detailed study carried out with current sensing atomic force microscopy proves that the photocurrent is predominately produced inside the highly ordered CuPc/p‐6P heterojunction grains, while the photocurrent produced at the boundaries between grains can be neglected. The research provides a good method for fabricating high‐performance organic phototransistors using a combination of molecular template growth and organic heterojunction.

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“…The P3HT:PCBM solar cells with H7-TiO2 NPs layer prepared from initial TiO2 NPs sol and the TiO2 NPs sol stored in air for 1 year exhibited the similar performance parameters [33]. More interestingly, these TiO2 NPs layer does not require thermal annealing and showed the similar properties to that treated with thermal annealing.…”

Section: Interface Modification For Polymer Oscs Employing Tio2 Nanopmentioning

confidence: 70%

“…4 suggested that the TiO2 NPs layers without thermal annealing and with thermal annealing at 150°C had the comparable diffraction peaks, implying that the TiO2 NPs were already crystallized in sols. These solution-processed, annealing-free TiO2 NPs were used as ETL in P3HT:PCBM solar cells and showed improved performance parameters [33]. Meanwhile, it can also be used as ETL in low band gap alkoxylphenyl substituted [1,2-b:4,5-bʹ] dithiophene (PB-DTPO-DTBO) polymer solar cells and soluble small molecule benzodithiophene derivative (TIBDT) solar cells with improved performance, as shown in Table 1.…”

Section: Interface Modification For Polymer Oscs Employing Tio2 Nanopmentioning

confidence: 99%

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Interface modification for organic and perovskite solar cells

Wang

Yang

2016

Sci. China Mater.

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Organic solar cells (OSCs) continuously attract much attention due to their potentials as the low-cost and lightweight sources of renewable energy, and the power conversion efficiency (PCE) of the state-of-the-art OSCs has reached over 10.0%. Especially, there has been an unexpected breakthrough and rapid evolution of highly efficient organic-inorganic hybrid perovskite solar cells (PSCs), and the PCE has been improved to over 20%. The interface plays a very important role on the performance of both OSCs and PSCs, as well as their stability. It is imperative to control the interface properties and understand the mechanisms for obtaining highly efficient OSCs and PSCs. In this review, we will summarize our research progress on the interface modification of OSCs and PSCs using the electron transport layer and hole transport layer, as well as the molecular template layer.

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Efficient organic photovoltaics using solution-processed, annealing-free TiO2 nanocrystalline particles as an interface modification layer

Cited by 46 publications

References 45 publications

Effect of thiophene spacers in benzodithiophene‐based polymers for organic electronics

Effect of thiophene spacers in benzodithiophene‐based polymers for organic electronics

High‐Performance Organic Heterojunction Phototransistors Based on Highly Ordered Copper Phthalocyanine/para‐Sexiphenyl Thin Films

Interface modification for organic and perovskite solar cells

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