Our research focuses on achieving high performance, low cost organic electronic devices and nanoelectronic devices including Organic Solar Cells, Nanocrystal Solar Cells, Photodetectors, Transistors, Memoristors, and other types of Sensors.
Highlight of Recent Publications:
Fullerene Photodetectors with a Linear Dynamic Range of 90 dB Enabled by a Cross-Linkable Buffer Layer
Fawen Guo, Zhengguo Xiao, and Jinsong Huang, Advanced Optical Materials, 1, 289-294 (2013)
A low-noise, highsensitivity, fullerene-based organic photo detector with a wide dynamic range is reported, which shows an excellent linear response from indoor light intensity to 12 pW/m2, corresponding to a linear dynamic range (LDR) of 90 dB.
A nanocomposite ultraviolet photodetector based on interfacial trap-controlled charge injection
Fawen Guo, Bin Yang, Yongbo Yuan, Zhengguo Xiao, Qingfeng Dong, Yu Bi, Jinsong Huang, Nature nanotechnology, 7, 798-802 (2012)
A solution-processed ultraviolet photodetector with a nanocomposite active layer composed of ZnO nanoparticles blended with semiconducting polymers can significantly outperform inorganic photodetectors.
Solution-Processed Fullerene-Based Organic Schottky Junction Devices for Large-Open-Circuit-Voltage Organic Solar Cells
Bin Yang, Fawen Guo, Yongbo Yuan, Zhengguo Xiao, Yunzhang Lu, Qingfeng Dong, Jinsong Huang, Advanced Materials, 25, 572-577 (2013)
A solution-processed fullerene-based organic Schottky junction photovoltaic device is fabricated to produce a large open circuit voltage, 0.85-0.95 V, which is higher than that of most organic bulk-heterojunction devices. A power conversion efficiency of 5% is achieved in fullerene-derivative [6,6]-phenyl-C71-butyric acid methylester-based Schottky junction devices.
Understanding the effect of ferroelectric polarization on power conversion
efficiency of organic photovoltaic devices
Yongbo Yuan, Pankaj Sharma, Zhengguo Xiao, Shashi Poddar, Alexei Gruverman, Stephen Ducharme and Jinsong Huang, Energy and Environmental Science, 5, 8558 (2012)
The effect of P(VDF-TrFE) crystallinity on the performance of a ferroelectric OPV (FE-OPV) has been studied. It was shown the enhanced PCE and the switchable FE-OPVs is well connected to the ferroelectric nature of the P(VDF-TrFE)) crystalline. The results highlight the P(VDF-TrFE)) crystallinity as a critical issue for FE-OPVs and provide guidance for the fabrication of high performance FE-OPV devices.
Tuning the Energy Level Offset between Donor and Acceptor with Ferroelectric Dipole Layers for Increased Efficiency in Bilayer Organic Photovoltaic Cells
Bin Yang, Yongbo Yuan, Pankaj Sharma, Shashi Poddar, Rafal Korlacki, Stephen Ducharme, Alexei Gruverman, Ravi Saraf, Jinsong Huang, Advanced Materials, 24,1455 (2012)
A general method is reported to increase the power conversion effieciency of polymer solar cells without changing their chemical structures of the light absorbing molecules: a tunable dipole layer was inserted between donor and acceptor layer to tune their lowest unoccupied molecular orbital (LUMO) offset without interrupt the carrier conduction, and then to increase open circuit voltage.
Air Stable, Photosensitive, Phase Pure Iron Pyrite Nanocrystal Thin
Films for Photovoltaic Application
Y. Bi, Y. Yuan, C. L. Exstrom, S. A. Darveau, and J. Huang, Nano Lett.. 11, 4953 (2011)
We report the rational synthesis of phase pure, highly crystalline cubic FeS2 nanocrystals (NCs) using a trioctylphosphine oxide (TOPO) assisted hot-injection method. The synthesized pyrite NC films have excellent air stability over one year. In contrast, obvious surface decomposition was observed on the surface of FeS2 NCs synthesized without TOPO.
Efficiency enhancement in organic solar cells with
Yongbo Yuan, Timothy J. Reece, Pankaj Sharma, Shashi Poddar, Stephen Ducharme,
Alexei Gruverman, Yang Yang and Jinsong Huang, Nature Materials, 10, 296 (2011)
One of the key loss mechanisms in the operation of organic solar cells is the separation and extraction of the generated charge carriers from the active region. The use of a ferroelectric layer is now shown to create large internal electric fields, resulting in an enhanced carrier extraction and increased device efficiency.
Room-temperature organic ferromagnetism in the crystalline poly(3-hexylthiophene): Phenyl-C61-butyric acid methyl ester blend film
Bin Yang, Zhengguo Xiao, Yongbo Yuan, Tanjore V. Jayaraman, Jeffrey E. Shield, Ralph Skomski and Jinsong Huang, Polymer, 54, 490-494 (2013)
We recently discovered that polymer semiconductors, such as poly(3-hexylthiophene)(P3HT), can have room temperature (RT) ferromagnetic properties in their crystalline phase and when mixed with phenyl-C61-butyric acid methyl ester (PCBM). Tens to hundreds nm size domains are clearly observed by magnetic force microscopy (MFM), and the ferromagnet was confirmed by superconducting quantum interference devices (SQUID).