非线性机制为激子带展宽。
这种获得能量的电子和他留在原来能级上对应的位置的空穴的相互作用叫做一个激子激发过程，而这两个不同能级之间的部分被称作带隙。
The interaction between the energized electron and the hole it leaves behind is called an exciton, and the difference in energy levels between the hole and the electron is known as the bandgap.
在芴与dbt的共聚物中，观察到了由于激子在低带隙单体DBT位置的捕获而产生的有效的能量转移。
In the copolymers of fluorene and DBT, the efficient energy transfer due to exciton trapping on narrow band-gap DBT sites has been observed.
三能级模型下跃迁通道分析表明，三能级偶极耦合增强不仅与B带激子跃迁态有关，还与CT态密切相关。
Transition three-level model channel analysis showed that three-level dipole coupled with enhanced not only with the B exciton transition state, but also closely related with the CT state.
三能级模型下跃迁通道分析表明，三能级偶极耦合增强不仅与B带激子跃迁态有关，还与CT态密切相关。
Transition three-level model channel analysis showed that three-level dipole coupled with enhanced not only with the B exciton transition state, but also closely related with the CT state.
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