Recent Activities: 2018 Croucher Summer Course on Neutron Scattering at CityU

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During 9-14th July, I attended the 2018 Croucher Summer Course on Neutron Scattering held at the City University of Hong Kong. The China Spallation Neutron Source (CSNS) in Dongguan has already been open to user this yeaThis course aims at training potential users for the newly built facility. Neutrons interact only with the nucleus of materials, giving it excellent sensitivity to light atoms as well as isotopes, which is the advantages over X-rays.… Read More

Research Highlights: Hidden structure ordering along backbone of fused-ring electron acceptors enhanced by ternary bulk heterojunction

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Fused-ring electron acceptors (FREAs), as a family of non-fullerene acceptors, have achieved tremendous success in pushing the power conversion efficiency of organic solar cells. Here, we reported the detailed molecular packing motifs of two extensively studied FREAs – ITIC and ITIC-Th, which is revealed for the first time the long-range structure ordering along the backbone direction originated from favored end group π-π stacking.… Read More

Research Highlights: Fused-Ring Electron Acceptor ITIC-Th: A Novel Stabilizer for Halide Perovskite Precursor Solution

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The stability of perovskite solar cells (PSCs) has been greatly improved recently while very few studies focus on the long-term stability of the perovskite precursor solution. We report a novel route to greatly enhance the long-term stability of perovskite precursor solutions by incorporating a non-fullerene small molecule ITIC-Th. We found that the incorporation of ITIC-Th in the perovskite precursor solution can effectively suppress the unwanted yellow non-perovskite phase (δ-phase) commonly formed in the FAPbI3-based perovskite film made from a long-time aged precursor solution and consequently promote the formation of photoactive perovskite phase (α-phase).… Read More

Recent News: Congratulations! Chan Pak Kei won the best poster award in the 2017 Undergraduate Summer Internship Program

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In the 2017 summer internship program, I did a research about cesium-doped perovskite solar cell with the help of Professor Xinhui Lu and her PhD student Minchao Qin. I was honored that I could get the best poster award from the poster presentation when I presented the results of my research with poster in the end of this program.… Read More

Research Highlights: High efficiency ternary organic solar cell with morphology-compatible polymers

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jmca2017Following our previously proposed selection rule for the two polymers capable of comparable loadings, we report in this work a ternary system composed of two morphologically compatible polymers with distinct chemical structures that can achieve a high PCE of 9.0% with a mass ratio of 1 : 1. Besides the expected improvement in short circuit current due to the broadening of the absorption spectrum, the fill factor of the ternary device is improved significantly.… Read More