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Featured researches published by Rong Wu.


RSC Advances | 2015

Graphene oxide/core–shell structured TiO2@TiO2−x nanocomposites with highly efficient visible-light photocatalytic performance

Shunhang Wei; Rong Wu; Jikang Jian; Juan Hou; Fengjuan Chen; Abduleziz Ablat; Yanfei Sun

Graphene oxide/core–shell structured TiO2@TiO2−x nanocomposites with outstanding photocatalytic performance were prepared by combining graphene oxide and black titania. Ti3+ and graphene oxide as a mediator of electron transfer were introduced into the compounds, which strongly enhanced visible-light absorption and photocatalysis.


RSC Advances | 2017

The interface degradation of planar organic–inorganic perovskite solar cell traced by light beam induced current (LBIC)

Yanqing Yao; Gang Wang; Fei Wu; Debei Liu; Chunyan Lin; Xi Rao; Rong Wu; Guangdong Zhou; Qunliang Song

The light beam induced current (LBIC) method was adopted to nondestructively map the photoresponse of real planar organic–inorganic hybrid perovskite solar cells (PSCs). It is found that the photoresponse of the devices is not uniform even though the morphology of the perovskite films from scanning electron microscope (SEM) or atomic force microscope (AFM) images shows uniform character. This nonuniformity of the photoresponse of the devices is further exacerbated after degradation, which can be well traced by the LBIC method. The indistinguishable morphology change during the device degradation indicates that the degradation of the device is not mainly determined by the morphology of the perovskite layer, but by the interface between the perovskite and the electrode. By using the LBIC method, the worse performing area of the device is identified and then removed accordingly. The current density of the device can be enhanced from 19.44 mA cm−2 to 21.72 mA cm−2 after this clearance of the worse performing area.


Integrated Ferroelectrics | 2013

Solvothermal Synthesis of Single-Crystal Bismuth Selenide Nanoplates

Chunyan Song; Rong Wu; Jin Li; Yanfei Sun; Jikang Jian

Bismuth Selenide (Bi2Se3) nanoplates have been synthesized via a facile solvothermal route using the mixed solvents of ethylenediamine (EN) and ethylene glycol (EG) with the assistant of polyvinylpyrrolidone (PVP). The X-ray diffraction and Transmission electron microscopy (TEM) indicate that the nanoplates are well-crystallized single crystals with rhombohedral phase. Scanning electron microscopy (SEM) observations show that the nanoplates have approximate hexagonal outer shape with lateral length of 200–600 nm and thickness of 80–160 nm. The influences of solvents and PVP on the growth of the nanoplates were checked and it is found that EN can facilitate the formation of plate-like morphology while EG and PVP can benefit the uniform hexagonal outer shape. The P-type conduction of the Bi2Se3 nanoplates is revealed by Hall measurement.


RSC Advances | 2015

C/Si/core–shell structured TiO2@TiO2−x nanocomposites with excellent visible-light photocatalytic performance

Shunhang Wei; Rong Wu; Jikang Jian; Yanfei Sun

C/Si/core–shell structured TiO2@TiO2−x nanocomposites were obtained by combining C, Si and black TiO2. Amounts of Ti3+ and oxygen vacancies in TiO2@TiO2−x and the electron transfer among C, Si and TiO2@TiO2−x inhibited electron/hole recombination, which resulted in excellent photocatalytic performance.


Integrated Ferroelectrics | 2016

Structure and optical properties of Sn doped delafossite oxides CuGaO2 by hydrothermal method

Cong Shang; Rong Wu; Jikang Jian; Yanfei Sun

abstract CuGa1-×Sn×O2 (0 ≤ × ≤ 0.1427) samples were synthesized by convenient hydrothermal method. The crystal structure and optical properties were also investigated. Results revealed that the CuGa1-×Sn×O2 samples are delafossite oxides with a rhombohedral (space group R-3m) structure; the XPS spectra confirmed that the valence state of Sn is +4. Increasing the concentration of doped Sn atoms decreased the band gap from 3.83 eV to 3.45 eV. The offset of the X-ray diffraction pattern and the change in transmittance indicated that the critical threshold was reached when the Sn concentration reached 6.23 at.%.


Dalton Transactions | 2015

Black and yellow anatase titania formed by (H,N)-doping: strong visible-light absorption and enhanced visible-light photocatalysis

Shunhang Wei; Rong Wu; Jikang Jian; Fengjuan Chen; Yanfei Sun


Chemical Engineering Journal | 2016

One-step synthetic approach for core-shelled black anatase titania with high visible light photocatalytic performance

Shunhang Wei; Rong Wu; Xiaoxiang Xu; Jikang Jian; Haixia Wang; Yanfei Sun


Organic Electronics | 2017

Crystallization process of perovskite modified by adding lead acetate in precursor solution for better morphology and higher device efficiency

De Bei Liu; Gang Wang; Fei Wu; Rong Wu; Tian Chen; Bao Fu Ding; Qun Liang Song


Organic Electronics | 2017

Impact of additive residue on the photodegradation of high performance polymer solar cells

Xusheng Zhao; Jing Zhao; Rong Wu; Debei Liu; Gang Wang; Ping Li; Lijia Chen; Linna Zhu; Baofu Ding; Qunliang Song


Organic Electronics | 2018

Enhancing the open circuit voltage of PEDOT:PSS-PC 61 BM based inverted planar mixed halide perovskite solar cells from 0.93 to 1.05 V by simply oxidizing PC 61 BM

Yanqing Yao; Gang Wang; Liping Liao; Debei Liu; Guangdong Zhou; Cunyun Xu; Xiude Yang; Rong Wu; Qunliang Song

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Yanfei Sun

Laboratory of Solid State Physics

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Jikang Jian

Laboratory of Solid State Physics

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Shunhang Wei

Laboratory of Solid State Physics

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Fei Wu

Southwest University

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Jikang Jian

Laboratory of Solid State Physics

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