Revisiting the Growth of Black Phosphorus in Sn-I Assisted Reactions

Frontiers in Chemistry

卷:7

Lu Zhang¹  Peng Yi¹  Hai Li¹  Ling Huang¹  Lin Wang¹  Min Lu¹  Dongya Wang¹  Xiaoji Xie¹  Wei Huang² 

[1] Key Laboratory of Flexible Electronics (KLOFE), Institute of Advanced Materials, Nanjing Tech University, Nanjing, China;

[2] Shaanxi Institute of Flexible Electronics, Northwestern Polytechnical University, Xi'an, China;

关键词: black phosphorus;    growth mechanism;    tin iodide;    chemical vapor transport;    2D materials;   

DOI  :  10.3389/fchem.2019.00021

来源: DOAJ

【 摘 要 】

Black phosphorus, an emerging layered material, exhibits promising applications in diverse fields, ranging from electronics to optics. However, controlled synthesis of black phosphorus, particularly its few-layered counterparts, is still challenging, which should be due to the unclear growth mechanism of black phosphorus. Here, taking the most commonly used Sn-I assisted synthesis of black phosphorus as an example, we propose a growth mechanism of black phosphorus crystals by monitoring the reactions and analyzing the as-synthesized products. In the proposed mechanism, Sn24P19.3I8 is the active site for the growth of black phosphorus, and the black phosphorus crystals are formed with the assistance of SnI2, following a polymerization-like process. In addition, we suggest that all Sn-I assisted synthesis of black phosphorus should share the same reaction mechanism despite the differences among Sn-I containing additives. Our results shown here should shed light on the controlled synthesis of black phosphorus and facilitate further applications of black phosphorus.

【 授权许可】

Unknown