Perovskite of the shenzhen advanced solar photovoltaic hysteresis mechanism research progress

Recently, shenzhen institute of advanced technology, Chinese Academy of Sciences regulation and biomechanics research center in perovskite solar photoelectric hysteresis mechanism research for new progress. Related research results published in the journal of advanced materials ( 睡觉。 Mater. 2019, 1902870) On.

new perovskite organic metal halide solar cell with low cost, small energy consumption, flexible plastic and conversion efficiency higher advantages, in the last ten years, increasing attention worldwide. Nonetheless, perovskite solar battery materials in the test and application show that the complex coupling effect, its, it is necessary to study the physical mechanism behind the one of the representative problem is widespread electric hysteresis volt-ampere tests. In order to solve this problem, the existing studies on nonpolar or weak polarity perovskite materials ion movement is the main reason for the delay, but probably the polarity of the photoelectric hysteresis effect mechanism is unclear.

based on this, nano regulation and biomechanics research center and the university of Washington, zhejiang university, shijiazhuang railway university joint research team for three yuan cation mixed halide perovskite solar battery material study, using atomic force microscope for the piezoelectric response to nanoscale characterization and optical performance, found significantly to the enhanced effect of polarization of light, and the ion movement and there was no significant change. Photocurrent microscopy combined with principal component analysis (pca), according to the materials in the local scale photovoltaic hysteresis phenomenon, found no macro device level and get the data confirm. The work directly to prove the existence of the perovskite solar battery polarity will not lead to the sluggish, the feasibility of the carrier for the polarity separation by using light students provides a strong support.

together for the first author and biomechanics research center for nano regulation visiting students summer both, Huang Boyuan and zhang ying. The work is the national key research and development program, the national natural science funds and other support.