Topic research

Study Perovskite solar cell by AFM characterization

Improve Perovskite layer by using additives

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Experience gain

This was my first hands-on experience in fabricating a p–i–n perovskite solar cell. I was guided step by step by my senior throughout the entire fabrication process, including the deposition of each individual layer. During this training, I also learned to operate essential laboratory equipment such as the spin coater, hot plate, thermal evaporator, glove box, and photovoltaic (PCE) measurement system. This experience gave me both a practical understanding of the fabrication workflow and the technical skills needed to handle specialized equipment for perovskite solar cell research.

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After the fabrication process, she also guided me in interpreting the perovskite layer results using SEM, AFM, and XRD characterization techniques. Additionally, I received specialized training in advanced AFM techniques from an expert, who instructed me on the use of Kelvin Probe Force Microscopy (KPFM) to determine the work function of the sample and Conductive AFM (C-AFM) to measure charge carrier distribution.

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I also learned about the role of various additives in enhancing perovskite film quality. These include controlling grain growth to minimize pinholes, passivating defects by reducing trap states and vacancies, and serving as antisolvents during spin coating to regulate crystallization dynamics.

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Impression

My internship at Chung-Ang University was a truly eye-opening experience. It gave me the opportunity to meet and interact with researchers and peers from diverse backgrounds, allowing me to build meaningful professional and academic connections. Beyond technical training in the lab, I was also able to explore the facilities and gain firsthand exposure to the research environment of an international university. This experience not only broadened my scientific perspective but also strengthened my ability to engage in collaborative and cross-cultural academic activities.

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Since Korea is well known for its technological expertise, my internship experience there helped broaden my perspective beyond the laboratory. For example, I was impressed by their advanced transportation system. The integration of highly accurate GPS navigation with a unified transportation card system makes commuting remarkably efficient. A single card can be used seamlessly across buses, subways, and even convenience stores, reducing the hassle of carrying multiple tickets or cash. This level of technological integration not only makes daily life easier for residents but also provides great convenience for tourists, allowing them to navigate the city with confidence. Experiencing such innovations firsthand gave me deeper appreciation of how advanced technologies can be applied in everyday life to improve efficiency and accessibility.