Whereas the penetration depth of photons in the organic layer usually exceeds 100 nm, the exciton diffusion length, which is the distance an excited state travels during its lifetime, is only several tens of angstroms.
给这篇翻译加备注
penetration:girmek-depth:derinlik-exciton:uyarım-exited state:uyarılmış hal angstroms u aynen yazabilirsiniz
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