Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Ji Qi is active.

Publication


Featured researches published by Ji Qi.


Chemical Record | 2016

Advances in Organic Near-Infrared Materials and Emerging Applications

Ji Qi; Wenqiang Qiao; Zhi Yuan Wang

Much progress has been made in the field of research on organic near-infrared materials for potential applications in photonics, communications, energy, and biophotonics. This account mainly describes our research work on organic near-infrared materials; in particular, donor-acceptor small molecules, organometallics, and donor-acceptor polymers with the bandgaps less than 1.2 eV. The molecular designs, structure-property relationships, unique near-infrared absorption, emission and color/wavelength-changing properties, and some emerging applications are discussed.


Journal of Materials Chemistry C | 2017

Low-bandgap donor–acceptor polymers for photodetectors with photoresponsivity from 300 nm to 1600 nm

Jinfeng Han; Ji Qi; Xiuping Zheng; Yukun Wang; L. Hu; Chang Guo; Yang Wang; Yuning Li; Dongge Ma; Wenqiang Qiao; Zhi Yuan Wang

A novel donor unit dithienobenzotrithiophen (DTBTT) was designed and utilized in the synthesis of a series of donor–acceptor (D–A) polymers with the thienoisoindigo-based acceptor. The relationships between the structure of polymers and the absorption spectra, electrochemistry properties, hole mobility, and photovoltaic properties of these polymers have been studied. The results showed that low-bandgap D–A polymers containing DTBTT are suitable for use in broadband polymer photodetectors. Polymer photodetectors exhibited a specific detectivity (D*) in the order of 1012 Jones, low dark current and photoresponsivity at the wavelengths from 300 to 1600 nm.


RSC Advances | 2016

Significant enhancement of photodetector performance by subtle changes in the side chains of dithienopyrrole-based polymers

L. Hu; Wenqiang Qiao; Ji Qi; Xiaoqin Zhang; Jinfeng Han; Canglong Wang

A pair of analogous polymers based on diketopyrrolopyrrole (DPP) and dithienopyrrole (DTP) were designed to have a small structural difference in the side chain, PDDPDTP-C with an alkyl chain and PDPPDTP-P with an alkylphenyl chain. The two polymers have the same absorption and band gap but show different hole mobility, molecular stacking and film morphology. As a result, the PDPPDTP-P photodetector has a much higher responsivity (291 mA W−1 at 900 nm at −0.1 V) than the one based on PDDPDTP-C (36 mA W−1), and exhibits a specific detectivity over 1012 Jones in the spectral region of 350–950 nm.


Journal of Materials Chemistry C | 2015

Hierarchical manipulation of uniform multi-nanoparticles by electrochemical coupling assembly

Jian Zhang; Ji Qi; Shusen Kang; Hai-Zhu Sun; Mao Li

Assembling multiple nanomaterials into a single nanostructure is a promising way to obtain a multifunctionality derived from each building block. We address here the need for a general all-solution processed strategy to control the fabrication of multiple nanoparticles (NPs) at room temperature and under vacuum free conditions. The monodisperse multiple NPs were integrated successively into thin bulk-hybrid gradient or periodic tandem multilayer films through tuning the cycling number of cyclic voltammetry (CV), which are based on the quantitatively electrochemical deposition of each type of NPs thanks to the electrochemical coupling reaction of the N-alkylcarbazole ligand. This simple method yields nanoporous, transparent, stable and photoactive films with a hierarchical structure of multiple uniform NPs, exemplified by the prototype photodetector devices. Significantly, this strategy opens an avenue to fabricate low-cost wire and 3-dimensional NPs films on physically flexible conducting substrates.


Chemistry of Materials | 2012

Efficient Non-doped Near Infrared Organic Light-Emitting Devices Based on Fluorophores with Aggregation-Induced Emission Enhancement

Xiaobo Du; Ji Qi; Zhiqiang Zhang; Dongge Ma; Zhi Y. Wang


Advanced Functional Materials | 2014

Optimization of Solubility, Film Morphology and Photodetector Performance by Molecular Side‐Chain Engineering of Low‐Bandgap Thienothiadiazole‐Based Polymers

Ji Qi; Xiaokang Zhou; Dezhi Yang; Wenqiang Qiao; Dongge Ma; Zhi Yuan Wang


Journal of Materials Chemistry C | 2014

Panchromatic small molecules for UV-Vis-NIR photodetectors with high detectivity†

Ji Qi; Liang Ni; Dezhi Yang; Xiaokang Zhou; Wenqiang Qiao; Mao Li; Dongge Ma; Zhi Yuan Wang


Macromolecules | 2015

Optimization of Broad-Response and High-Detectivity Polymer Photodetectors by Bandgap Engineering of Weak Donor–Strong Acceptor Polymers

Ji Qi; Jinfeng Han; Xiaokang Zhou; Dezhi Yang; Jidong Zhang; Wenqiang Qiao; Dongge Ma; Zhi Yuan Wang


Advanced Materials Interfaces | 2015

Significant Enhancement of the Detectivity of Polymer Photodetectors by Using Electrochemically Deposited Interfacial Layers of Crosslinked Polycarbazole and Carbazole‐Tethered Gold Nanoparticles

Ji Qi; Yixing Gao; Xiaokang Zhou; Dezhi Yang; Wenqiang Qiao; Dongge Ma; Zhi Yuan Wang


Macromolecular Chemistry and Physics | 2016

High‐Detectivity All‐Polymer Photodetectors with Spectral Response from 300 to 1100 nm

Ji Qi; Wenqiang Qiao; Xiaokang Zhou; Dezhi Yang; Jidong Zhang; Dongge Ma; Zhi Yuan Wang

Collaboration


Dive into the Ji Qi's collaboration.

Top Co-Authors

Avatar

Wenqiang Qiao

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Dongge Ma

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Dezhi Yang

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Xiaokang Zhou

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Jinfeng Han

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Jidong Zhang

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

L. Hu

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Mao Li

Chinese Academy of Sciences

View shared research outputs
Top Co-Authors

Avatar

Chang Guo

University of Waterloo

View shared research outputs
Researchain Logo
Decentralizing Knowledge