Controllable Fabrication of Organic Semiconductors for Aligned Microlasers and Integrated Photodetectors

• Published in: Advanced optical materials Vol. 12; no. 16
• Main Authors: Qian, Mengdan, Zhang, Qiaoyan, Zhang, Hui, Tang, Baolei, Yu, Kun, Liu, Yufang
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01-06-2024
• Subjects: Arrays; Controllability; crystal engineering; Crystal growth; Crystal structure; integrated photodetectors; Laser processing; Lasers; Microchannels; Microlasers; Optoelectronics; Organic lasers; organic semiconductor; Organic semiconductors; Photometers; Photonic crystals; Self-assembly; Single crystals; template‐confined crystalline self‐assembly
• ISSN: 2195-1071; 2195-1071
• DOI: 10.1002/adom.202303142

Engineering of organic single crystal toward controllable and aligned patterns at microscale is crucial to the realization of highly integrated organic photonic devices and optoelectronics. However, precise positioning and controllable morphology of crystal structures is still challenging due to the strict conditions for crystal growth. In this paper, a solution based crystal regulation strategy with the assistance of template‐constrained growth method and femtosecond laser processing technology is developed to prepare aligned crystalline microribbon arrays. Simple solvent evaporation results in the random distribution and orientation of self‐assembled crystalline microribbons while it tends to form highly crystalline and orderly microribbon arrays assisted by the confined template microchannels. The large‐scale microribbon array can be fabricated as organic photodetectors with sensitive and fast response under 405 nm illumination. By virtue of the femtosecond laser processing technique, the microribbon arrays are precisely processed into a series of crystal subunits and each microribbon subunit can function as an individual microcavity resonator to produce stable, high‐quality organic laser. The facile solution based template‐constrained self‐assembly and femtosecond laser processing method provide novel strategies to generate highly oriented and controllable crystal structures for the potential applications in integrated organic lasers and optoelectronics.
Engineering of organic semiconductors toward oriented array structures contributes to integrated optoelectronics and organic lasers. Template‐confined method provides an efficient way for the fabrication of long continuous microribbon array, which can be devided into specific subunits by femtosecond laser processing technique. The prepared microribbon arrays show promising application in mode‐tunable microlasers and integrated photodetector devices.