Latest News
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The international students of the University of Chinese Academy of Sciences have an in-depth experience of “Study in Beijing” and telling the story of China
From October to November 2024, the “Study in Beijing - A Program to Introduce China to International Students” sponsored by Beijing Municipal Education Commission was successfully held, attracting 52 international students from 41 countries on four continents and 31 universities in Beijing. Two international students recommended by the University of Chinese Academy of Sciences (hereinafter referred to as “UCAS”) were successfully selected. CASPER OEHLERS from Denmark and ARMIN SCHEER from Germany participated in the 6-day and 5-night program as student representatives, showing their rich enthusiasm for learning and profound cultural understanding.
As an important program of the capital’s education brand “Study in Beijing”, the course led international students to have an in-depth understanding of Chinese history and culture in an immersive way, and felt the unique charm of China’s development through practical activities. During the program, students visited Beijing, Hangzhou and Jingdezhen, and experienced the profound heritage of traditional Chinese culture by visiting cultural landmarks such as the Palace Museum, Temple of Heaven and Badaling Great Wall. In addition, they experienced practical courses on traditional Chinese medicine culture, tea picking and tea-making techniques, ceramic making, etc. These activities not only stimulated the international students’ interest in Chinese culture, but also deepened their understanding of China’s social and technological development.
CASPER OEHLERS, An International Student of UCAS, Experiences Facial Makeup
CASPER OEHLER Experiences Peking Opera
UCAS International student ARMIN SCHEER (sixth from left in the back row) at the Great Wall
UCAS International Student ARMIN SCHEER (right) experiences the culture of traditional Chinese medicine
ARMIN SCHEER (Chinese name KANG Ruide), from Sino-Danish College of UCAS, speaks as a student representative at the “Study in Beijing” outcome sharing session. In his speech, KANG said that although he had visited the Temple of Heaven and the Forbidden City before, this visit with international students from different cultural backgrounds gave him a new perspective and understanding. KANG especially expressed his admiration for the meticulous organization of the event, believing that through such an immersive course, he gained a deeper understanding of Chinese history, culture and modern development. KANG also shared his research experience, saying that he is pursuing a PhD at UCAS in conjunction with Copenhagen Business School on exploring the development of autonomous vehicles from a governance perspective, comparing the prospects of autonomous driving technology to the ceramic culture of Jingdezhen, arguing that China is becoming the “birthplace” of global technological innovation. In addition, he recorded the trip through the lens and plans to release the video content to overseas social platforms to show more international youth a real and diversified China. He said he hopes the sharing will help the world better understand China’s important role in cultural inheritance and scientific and technological innovation.
KANG Ruide spoke as a student representative
This practical course is the first national education course of the program system attempted by the Beijing Municipal Education Commission, providing international students with a systematic cultural experience and learning path. The course has stimulated the enthusiasm and creativity of international students through field visits, lectures by experts and multi-cultural exchanges, and provided a sustainable communication platform for brand building.
KANG Ruide was interviewed by BRTV
Through the “Study in Beijing - A Program to Introduce China to International Students” , UCAS international students not only gain a deeper understanding of China’s history and culture, but also contribute to promoting cross-cultural exchanges and global education cooperation by sharing Chinese stories with the world’s youth.
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Research News
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Suppressed Ion Migration in Tin Halide Perovskites for Stable X-Ray Detectors with Low Dark Current Drift
The detection of X-ray photons holds great significance for a wide range of applications, including medical radiography, intelligent security inspection, and environmental radiation monitoring. Halide perovskite X-ray detectors have attracted attention due to their large mobility-lifetime products, high sensitivity, and low detection limit. However, lead-based perovskites face toxicity issues, and significant internal ion migration leads to poor stability. Among lead-free perovskite materials, tin halide perovskites show great potential in radiation detection due to their high X-ray attenuation absorption coefficient, high charge carrier mobility, low exciton binding energy, and high ion migration activation energy. However, there is limited research on the radiation detection characteristics of tin halide perovskites.
Recently, the research group led by Professor MENG Xiangyue from the School of Optoelectronics at the University of Chinese Academy of Sciences, along with collaborators, selected an additive PAI to effectively improve the quality of tin-based perovskite films. This led to the development of FASnI3 perovskite films with low trap state density, enhanced crystallinity, and morphology, confirmed through in situ photoluminescence spectroscopy measurements. Due to their high polarity and efficient dielectric screening effect, FASnI3 films exhibit low exciton binding energy, high carrier mobility-life product, and high ion migration activation energy. The resulting FASnI3 perovskite X-ray detectors demonstrate high sensitivity and an ultra-low detection limit of 7.95 nGyairs-1. Compared to lead halide perovskite devices, FASnI3 perovskite X-ray detectors exhibit excellent device stability, with suppressed dark current drift. Moreover, high-contrast sensitive imaging was also achieved at an ultra-low dose rate of 70 nGyairs-1.
This work offers new ideas for exploring tin halide perovskites for high-sensitivity and high-stability X-ray detection. The achievement was recently published in Laser & Photonics Reviews, with Professor MENG Xiangyue as the corresponding author, doctoral candidate WANG Xu as the first author, and Dr. BIAN Yangshuang from the Institute of Chemistry, Chinese Academy of Sciences, as the co-first author.
Article information：
Suppressed Ion Migration in Tin Halide Perovskites for Stable X‐Ray Detectors with Low Dark Current Drift
WANG Xu, BIAN Yangshuang, WANG Hao, WANG Junfang, LIU Tianhua, XIAO Hongbin, GUO Yunlong, WEI Wenjuan, YANG Yang (Michael), MENG Xiangyue
Laser & Photonics Reviews
DOI: 10.1002/lpor.202401310
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