Degradation of the Photoluminescence of ZnTPP and ZnTPP–C60 Thin Films under Gamma Irradiation


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Аннотация

Porphyrins and their fullerene complexes are promising materials for organic photovoltaic structures. However, the stability of the properties of organic components under hard radiation is poorly studied. Here, the influence of γ irradiation with medium (about 104 Gy) and large (107 Gy) doses on the photoluminescence of thin structurally perfect films of both pure porphyrin ZnTPP and ZnTPP/C60 composite films in the molar ratio of 1.3: 1 is investigated. It is shown that the intensity of the electronic radiative transition (626 nm) decreases under the effect of γ irradiation, and the dose dependence is threshold. The threshold dose is ~20 kGy for the ZnTPP films. The intensity of the electron-vibrational part of the spectral dependence of the PL (670–690 nm) for both types of samples decreased at initial irradiation doses and decreases less with a further increase in the irradiation dose than for the purely electron transition. The addition of a fullerene in nanocomposite films increases the threshold dose, after which the PL of the films started to degrade, by a factor of ~2.5. Herewith, the spectral components of the PL associated with the manifestation of the radiation transition of the fullerene C60 are more stable under γ irradiation.

Авторлар туралы

N. Romanov

Peter the Great St. Petersburg Polytechnic University; Lappeenranta University of Technology

Хат алмасуға жауапты Автор.
Email: nikromanov.90@gmail.com
Ресей, St. Petersburg, 195251; Lappeenranta, 53850

M. Elistratova

Ioffe Institute

Email: nikromanov.90@gmail.com
Ресей, St. Petersburg, 194021

E. Lahderanta

Lappeenranta University of Technology

Email: nikromanov.90@gmail.com
Финляндия, Lappeenranta, 53850

I. Zakharova

Peter the Great St. Petersburg Polytechnic University

Email: nikromanov.90@gmail.com
Ресей, St. Petersburg, 195251

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