Xin Li

University of Electronic Science and Technology of China

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Xin Tong

Zhejiang University of Science and Technology

Ali Imran Channa

University of Electronic Science and Technology of China

Zhiming M. Wang

Chengdu University

Yimin You

University of Electronic Science and Technology of China

Hongyang Zhao

University of Electronic Science and Technology of China

Mengke Cai

University of Electronic Science and Technology of China

Feng Lin

University of Houston

Rui Wang

Sichuan University

Zhiming Wang

University of Electronic Science and Technology of China

Zhihang Long

Beijing University of Technology

Cooperative Institutions

University of Electronic Science and Technology of China

Chinese Academy of Sciences

University of Chinese Academy of Sciences

Chengdu University

Huzhou University

North China Electric Power University

Sun Yat-sen University

National Engineering Research Center of Electromagnetic Radiation Control Materials

Zhengzhou University

Tsinghua University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Role of Copper Doping in Heavy Metal‐Free InP/ZnSe Core/Shell Quantum Dots for Highly Efficient and Stable Photoelectrochemical Cell

Advanced Energy Materials (2021)

Hongyang Zhao Xin Li Mengke Cai Cheng Liu Yimin You

Abstract As emerging eco‐friendly alternatives to traditional Cd/Pb‐based quantum dots (QDs), InP/ZnSe(S) core/shell QDs have demonstrated huge potential in light‐emitting technologies. So far, these QDs have been rarely employed in solar energy conversion applications due to their type‐I band structure offering limited photo‐induced charge carrier separation and transfer. Here, a controllable Cu shell doping approach is reported to engineer the optoelectronic properties of InP/ZnSe core/shell QDs and realize high performance and stable solar‐driven photoelectrochemical (PEC) hydrogen evolution. As compared to the pristine InP/ZnSe QDs, the Cu‐doped core/shell QDs exhibit enhances the photo‐induced electron transfer rate due to the capture of photo‐generated holes via Cu impurity states in the shell, leading to improved photocurrent density and long‐term durability in as‐fabricated InP/ZnSe:Cu QDs‐PEC devices under standard one sun illumination. The results indicate that the doping of Cu in the shell has a preeminent effect on the optoelectronic properties of the core/shell QDs and may open up new avenues to tailor eco‐friendly core/shell QDs for high performance and stable solar energy conversion.

Photocurrent

10.1002/aenm.202101230

Cite

Citations (82)

Activating Earth-Abundant Element-Based Colloidal Copper Chalcogenide Quantum Dots for Photodetector and Optoelectronic Synapse Applications

ACS Materials Letters (2023)

Nan Zhou Hongyang Zhao Xin Li Peihang Li Yimin You

Colloidal copper chalcogenide-based CuAlS2 (CAS) quantum dots (QDs) composed of earth-abundant and benign elements are emerging building blocks for optoelectronic technologies. However, their potential applications in high-performance optoelectronic devices are still unexplored due to limited optical properties and poor charge transfer efficiency. Here, a new class of CAS/ZnSe QDs exhibiting decent visible light absorption/emission was prepared and associative QD-gold nanoclusters (Au NCs) heterostructures were rationally constructed for improved charge separation and transport efficiency. Both experimental and theoretical studies revealed that such metal nanocluster decoration enables effective charge transfer from QDs to Au NCs. Photodetectors (PDs) fabricated using CAS/ZnSe QDs and Au-QD heterostructures were further demonstrated, wherein the Au-QDs PD show enhanced device performance with a responsivity of 7.57 A W–1 and a detectivity of 2.48 × 1011 Jones (405 nm, 2.8 mW cm–2) compared to that of the CAS/ZnSe QD PDs. We found that the Au NCs conjunction is key to setting intermediate energy levels and facilitating photoinduced charge transfer from QDs to the electron-transport layers (TiO2) employed in PD devices. Besides, as-assembled, Au-QD PDs have demonstrated optoelectronic synapse application by emulating the learning and forgetting processes under optical stimulation, representing a promising prototype device to achieve future solution-processed neuromorphic electronics.

Nanoclusters

Photodetection

Charge carrier

10.1021/acsmaterialslett.3c00035

Cite

Citations (25)

Boosting the performance of eco-friendly quantum dots-based photoelectrochemical cells via effective surface passivation

Nano Energy (2020)

Xin Tong Ali Imran Channa Yimin You Peipei Wei Xin Li

Passivation

Photocurrent

Environmentally Friendly

10.1016/j.nanoen.2020.105062

Cite

Citations (53)

Rational design of colloidal AgGaS2/CdSeS core/shell quantum dots for solar energy conversion and light detection

Nano Energy (2021)

Xin Li Xin Tong Shuai Yue Cheng Liu Ali Imran Channa

Photocurrent

Visible spectrum

10.1016/j.nanoen.2021.106392

Cite

Citations (51)

Rational design of eco-friendly Mn-doped nonstoichiometric CuInSe/ZnSe core/shell quantum dots for boosted photoelectrochemical efficiency

Nano Research (2022)

Rui Wang Xin Tong Zhihang Long Ali Imran Channa Hongyang Zhao

Photocurrent

10.1007/s12274-022-4334-2

Cite

Citations (21)

Engineering the Optoelectronic Properties of Colloidal Alloyed Copper Chalcogenide Quantum Dots for High‐Efficiency Solar Energy Conversion

Solar RRL (2019)

Xin Tong Xin Li Ali Imran Channa Ruitong Liu Jingyin Xu

Colloidal alloyed copper chalcogenide Cu 2 − x Se 1 − y S y (CuSeS) quantum dots (QDs) are promising building blocks for solar energy applications because of their unique size/composition‐tunable optical bandgap, which is well matched to the sunlight spectrum. Nevertheless, poor charge separation/transfer and low photostability induced by their intrinsically abundant surface defects/traps tremendously hinder the realization of high‐performance solar energy conversion systems such as solar‐driven photoelectrochemical (PEC) devices. Herein, the synthesis of copper chalcogenide CuSeS core QDs with effective CdS shell passivation is presented. These core/shell QDs exhibit optimized optoelectronic properties with a particularly ultralong lifetime, indicating the formation of type‐II band structure for efficient spatial charge separation, which is further probed using ultrafast transient absorption (TA) spectroscopy. To demonstrate the feasibility of solar energy conversion, solar‐driven PEC cells using such core/shell QDs as light‐converters are fabricated, yielding an impressive saturated photocurrent density of ≈4 mA cm −2 with preeminent durability under 1 sun illumination. This finding highlights a potential technique to engineer the optoelectronic properties of colloidal alloyed copper chalcogenide nanomaterials for high efficiency and stable solar energy conversion devices.

Photocurrent

Passivation

Nanomaterials

Quantum Efficiency

Energy transformation

10.1002/solr.201900186

Cite

Citations (20)

Effective surface passivation of environment-friendly colloidal quantum dots for highly efficient near-infrared photodetectors

Journal of Materials Chemistry C (2022)

Yixuan Zhang Xin Tong Ali Imran Channa Rui Wang Nan Zhou

Eco-friendly CuInSnSe (CISnSe) QDs with broadband absorption were engineered via effective ZnSe shell passivation to fabricate highly efficient near-infrared photodetectors.

Passivation

10.1039/d2tc00880g

Cite

Citations (11)

Core/Shell Quantum-Dot-Based Solar-Driven Photoelectrochemical Cells

Lecture notes in nanoscale science and technology (2020)

Ali Imran Channa Xin Li Xin Tong Zhiming Wang

10.1007/978-3-030-46596-4_8

Cite

Citations (4)

Engineering the Optoelectronic Properties of Colloidal Alloyed Copper Chalcogenide Quantum Dots for High‐Efficiency Solar Energy Conversion

Solar RRL (2019)

Xin Tong Xin Li Ali Imran Channa Ruitong Liu Jingyin Xu

Optoelectronics In article number 1900186, Xin Tong, Zhiming M. Wang, and co-workers engineer the optoelectronic properties of colloidal alloyed copper chalcogenide CuSeS quantum dos (QDs) via CdS shell coating, which consequently exhibit strong visible absorption, near-infrared emission, and ultralong lifetimes. Such pyramid-shaped CuSeS/CdS core/shell QDs are used to fabricate QDs-based photoelectrochemical cells that show high-efficiency and stable solar-to-hydrogen energy conversion.

Energy transformation

10.1002/solr.201970094

Cite

Citations (2)

Synergistic selenium doping and colloidal quantum dots decoration over ZnIn2S4 enabling high-efficiency photoelectrochemical hydrogen peroxide production

Chemical Engineering Journal (2024)

Hongyang Zhao Yisen Yao Mengke Cai Xin Li Peihang Li

Photoelectrochemistry

Band bending

Quantum Efficiency

Oxygen evolution

10.1016/j.cej.2024.151925

Cite

Citations (3)