Scientists from NCCU and PSU, led by Professors Fei Yan and Mauricio Terrones, respectively, have published collaborative research on charge transfer modulation in V-doped WS2/Bi2O2Se heterostructures. Utilizing PL mapping, low-temperature PL, and KPFM measurements, they demonstrated superior charge transfer in V-doped WS2/Bi2O2Se compared to pristine WS2/Bi2O2Se. The PL was quenched by 40%, 95%, and 97% for WS2/Bi2O2Se, 0.4 at% V-WS2/Bi2O2Se, and 2 at% V-WS2/Bi2O2Se, respectively. Exciton binding energies were estimated at 130, 100, and 80 meV for the respective heterostructures, significantly lower than monolayer WS2. The findings highlight V-doping’s potential for tuning charge transfer in advanced photovoltaic devices, photodetectors, and photocatalysts. The study, published in Small (2023, 2302289, DOI: 10.1002/smll.202302289), marks an important milestone in materials science and photonics, with implications for highly efficient devices. Future research will explore V-doping effects on other heterostructures, optimizing charge transfer for advanced optoelectronics.
