“…Phosphorus allotropes, as exemplified by white, red, black, and violet phosphorus, offer a rich palette of physical properties within their large phase diagram [ 1 ]. Yet, the air instability and the toxicity of white phosphorus [ 1 , 2 ], and the low conductivity of red phosphorus [ 3 , 4 ] hinder their widespread exploration and utilization in electronics. In comparison, the two-dimensional (2D) black (BP) and violet phosphorus (VP, encompassing VP 11 [ 5 ] and VP 21 [ 6 ]) have recently garnered significant attention due to their appealing properties, such as good thermal stability [ 6 , 7 ], in-plane anisotropy [ 6 , 8 , 9 ], tunable direct bandgaps [ 7 , 10 , 11 , 12 ], substantial carrier mobilities [ 7 , 13 ], and associated promising optoelectronic prospects [ 12 , 14 , 15 , 16 , 17 ], which make them ideal platforms for both fundamental physics and application researches.…”