Shin Jiwon, Baek Kyeong-Yoon, Lee Jonghoon, Lee Woocheol, Kim Jaeyoung, Jang Juntae, Park Jaehyoung, Kang Keehoon, Cho Kyungjune, Lee Takhee
Department of Physics and Astronomy, and Institute of Applied Physics, Seoul National University, Seoul 08826, Republic of Korea.
Department of Materials Science & Engineering, Yonsei University, Seoul 03722, Republic of Korea.
Nanotechnology. 2021 Nov 18;33(6). doi: 10.1088/1361-6528/ac34a7.
A hybrid organic-inorganic halide perovskite is a promising material for developing efficient solar cell devices, with potential applications in space science. In this study, we synthesized methylammonium lead iodide (MAPbI) perovskites via two methods: mechanochemical synthesis and flash evaporation. We irradiated these perovskites with highly energetic 10 MeV proton-beam doses of 10, 10, 10, and 4 × 10protons cmand examined the proton irradiation effects on the physical properties of MAPbIperovskites. The physical properties of the mechanochemically synthesized MAPbIperovskites were not considerably affected after proton irradiation. However, the flash-evaporated MAPbIperovskites showed a new peak in x-ray diffraction and an increased fluorescence lifetime in time-resolved photoluminescence under high-dose conditions, indicating considerable changes in their physical properties. This difference in behavior between MAPbIperovskites synthesized via the abovementioned two methods may be attributed to differences in radiation hardness associated with the bonding strength of the constituents, particularly Pb-I bonds. Our study will help to understand the radiation effect of proton beams on organometallic halide perovskite materials.
有机-无机杂化卤化物钙钛矿是开发高效太阳能电池器件的一种有前途的材料，在空间科学中有潜在应用。在本研究中，我们通过两种方法合成了甲基碘化铅（MAPbI）钙钛矿：机械化学合成法和闪蒸法。我们用能量为10 MeV的高能质子束，以10、10、10和4×10质子/平方厘米的剂量辐照这些钙钛矿，并研究了质子辐照对MAPbI钙钛矿物理性质的影响。质子辐照后，机械化学合成的MAPbI钙钛矿的物理性质没有受到显著影响。然而，闪蒸法制备的MAPbI钙钛矿在高剂量条件下，X射线衍射出现了一个新峰，时间分辨光致发光中的荧光寿命增加，表明其物理性质发生了显著变化。通过上述两种方法合成的MAPbI钙钛矿行为上的这种差异，可能归因于与成分键合强度相关的辐射硬度差异，特别是Pb-I键。我们的研究将有助于理解质子束对有机金属卤化物钙钛矿材料的辐射效应。
