Tianjin Key Laboratory for Optoelectronic Materials and Devices;
Key Laboratory of Display Materials and Photoelectric Devices(Ministry of Education);
School of Materials Science and Engineering;
Tianjin University of Technology;
Tianjin 300384;
China;
New Energy Technology Engineering Laboratory of Jiangsu Province&School of Science;
Nanjing University of Posts and Telecommunications;
Nanjing 210023;
China;
Transition-metal borides; i-MAB phases; MBenes; Monolayer; Ordered metal vacancies;