Heteroatom Doping Effects on the Exciton Behavior in Carbonized Polymer Dots DOI
Zhihong Wei, Xin Yang,

Chengshuang Liao

и другие.

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Carbonized polymer dots (CPDs) are attractive optoelectronic materials for a variety of applications, but their complex structures hinder full understanding photophysical and excited-state properties. This work illustrates that heteroatom doping (N-doped, N,S-doped, N,S,F-doped CPDs) significantly affects the exciton behavior CPDs. It reveals unconventional photoluminescence (PL) blinking with multilevel intensity fluctuations, which depend on type excitation power density. The PL is attributed to formation charged excitons induced by doping, resembles characteristic semiconductor quantum dots. Additionally, nonradiative recombination enhances photothermal conversion efficiency, enabling effective therapy significant cytotoxicity against cancer cells. Our results provide compelling evidence CPDs possess properties similar those semiconductors instead emissive chromophores surface, while also highlighting multifunctionality as photoluminescent probes agents.

Язык: Английский

Heteroatom Doping Effects on the Exciton Behavior in Carbonized Polymer Dots DOI
Zhihong Wei, Xin Yang,

Chengshuang Liao

и другие.

Nano Letters, Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Carbonized polymer dots (CPDs) are attractive optoelectronic materials for a variety of applications, but their complex structures hinder full understanding photophysical and excited-state properties. This work illustrates that heteroatom doping (N-doped, N,S-doped, N,S,F-doped CPDs) significantly affects the exciton behavior CPDs. It reveals unconventional photoluminescence (PL) blinking with multilevel intensity fluctuations, which depend on type excitation power density. The PL is attributed to formation charged excitons induced by doping, resembles characteristic semiconductor quantum dots. Additionally, nonradiative recombination enhances photothermal conversion efficiency, enabling effective therapy significant cytotoxicity against cancer cells. Our results provide compelling evidence CPDs possess properties similar those semiconductors instead emissive chromophores surface, while also highlighting multifunctionality as photoluminescent probes agents.

Язык: Английский

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