Nonlinear photoluminescence properties of trions in hole-doped single-walled carbon nanotubes

作者：Akizuki Naoto^*; Iwamura Munechiyo; Mouri Shinichiro; Miyauchi Yuhei; Kawasaki Tomohiro; Watanabe Hiroshi; Suemoto Tohru; Watanabe Kouta; Asano Kenichi; Matsuda Kazunari

来源：Physical Review B, 2014, 89(19): 195432.

DOI：10.1103/PhysRevB.89.195432

We studied the excitation density dependence of photoluminescence (PL) spectra of excitons and trions (charged excitons) in hole-doped single-walled carbon nanotubes. We found that the PL intensity of trions exhibited a strong nonlinear saturation behavior as the excitation density increased, whereas that of excitons exhibited a weak sublinear behavior. The strong PL saturation of trions is attributed to depletion of doped holes that are captured by excitons in the formation processes. Moreover, the effective radiative lifetime of a trion was evaluated to be approximately 20 ns.

• 出版日期2014-5-21