Kim, Woosik Kim, Su-Kyung Jeon, Sanghyun Ahn, Junhyuk Jung, Byung Ku Lee, Sang Yeop Shin, Chanho Seong, Tae-Yeon Jeong, Sohee Jang, Ho Seong Ng, TSe Nga Oh, Soong Ju 2024-01-19T12:30:28Z 2024-01-19T12:30:28Z 2022-04-05 2022-04 1616-301X https://pubs.kist.re.kr/handle/201004/115474 Perovskite has been actively studied for optoelectronic applications, such as photodetectors and light-emitting diodes (LEDs), because of its excellent optoelectronic properties. However, ionic bonds of the perovskite structure are vulnerable to chemicals, which makes perovskite incompatible with photolithography processes that use polar solvents. Such incompatibility with photolithography hinders perovskite patterning and device integration. Here, an all-solution based cesium lead halide perovskite (CsxPbyBrz) patterning method is introduced in which PbBr2 is patterned and then synthesized into CsxPbyBrz. Each step of the top-down patterning process (e.g., developing, etching, and rinsing) is designed to be compatible with existing photolithography equipment. Structural, chemical, and optical analyses show that the PbBr2 pattern of (10 mu m)(2) squares is successfully transformed into CsPbBr3 and Cs4PbBr6 with excellent absorption and emission properties. High-resolution photoconductor arrays and luminescent pattern arrays are fabricated with CsPbBr3 and Cs4PbBr6 on various substrates, including flexible plastic films, to demonstrate their potential applications in image sensors or displays. The research provides a fundamental understanding of the properties and growth of perovskite and promotes technological advancement by preventing degradation during the photolithography process, enabling the integration of perovskite arrays into image sensors and displays. English John Wiley & Sons Ltd. Patterning All-Inorganic Halide Perovskite with Adjustable Phase for High-Resolution Color Filter and Photodetector Arrays Article 10.1002/adfm.202111409 1 Advanced Functional Materials, v.32, no.16 Advanced Functional Materials 32 16 N scie scopus 000737723900001 2-s2.0-85122214257 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article HIGH-QUALITY CSPBBR3 SOLAR-CELLS NANOCRYSTALS PERFORMANCE DEPOSITION CSPBX3 BR CL device arrays lithography patterning perovskites