On May 30th, the academic journal "Advanced, Materials" published by Wiley Publishing Co., Ltd. published the School of Optoelectronic Information and Energy Engineering of Wuhan Polytechnic University. Dr. Qin Pingli, the young teacher of the School of Mathematical Sciences, was the latest scientific research member of the perovskite photovoltaic device "Stableand EfficientOrgano-metal". Halide HybridPerovskite Solar Cells via π-Conjugated Lewis base Polymer InducedTrap-Passivation and Charge-Extraction. The first author of the paper, Dr. Qin Pingli, was invited to attend the fifth session of the new solar cell academic organized by the Institute of Physics of the Chinese Academy of Sciences on May 26-27. Seminar and invited to give a report on the conference.
Advanced Materials is a top journal in the field of materials science (including materials chemistry, materials physics, biomaterials, nanomaterials, optoelectronic materials, metal materials, inorganic non-metallic materials, electronic materials, etc.). The impact factor of the current journal is close to 20.
In 2009, the perovskite was first reported as a photoactive layer for solar cells, and the energy conversion efficiency (PCE) of the corresponding battery was increased from 3.8% to the current 22.7%. Currently, battery stability is the biggest bottleneck for commercialization, especially for wet The effect of gas is greater. Polymer organic semiconductors have good charge transport properties, are easy to film and have hydrophobic properties, and are expected to be applied to perovskite batteries to advance the commercialization of batteries. In this paper, anti-solvent methods were used for calcium. A very small amount of polymer PBDB-T (which is also a star molecule in current non-fullerene organic polymer solar cells) has been incorporated into the thin film of the titanium photo-sensitive layer. The device efficiency has increased from 17.28% to a maximum of 19.85%.
At the same time, PBDB-T with strong hydrophobicity can effectively improve the stability of the corresponding battery. In the case of non-encapsulated perovskite battery at room temperature, dry air storage conditions, 3600 hours/~5 months can still maintain more than 90% of the initial efficiency. In indoor (~70% relative humidity) and 85°C heating conditions, the lifetime of the unpackaged battery T70 increased by ~300%. It is noteworthy that the attenuation caused by strong light is much more severe than 85°C heating. The study of the influence of the sunlight intensity of the LED white light on the performance of the photovoltaic cell. Without considering the initial rapid efficiency attenuation, the lifetime of the T40 device is significantly increased from 6 hours to 270 hours, which is approximately 45 times.
Dr. Qin Pingli graduated from Wuhan University in 2012 with a PhD in Physics. In the same year he tracked the development of photovoltaics at the postdoctoral station of physics at Wuhan University. He went to the Hong Kong Polytechnic University Li Gang Group for a one-year study in 2017. The publication of this paper marks the The college has made new achievements in personnel training, discipline development and scientific research.
