- Erciyes Üniversitesi Fen Bilimleri Enstitüsü Dergisi
- Cilt: 40 Sayı: 1 Güncel Sayı
- Efficiency Improvement of Organic Photovoltaic Solar Cells via Spin Radical Doping
Efficiency Improvement of Organic Photovoltaic Solar Cells via Spin Radical Doping
Authors : Kevser Şahin Tıraş
Pages : 68-74
View : 39 | Download : 49
Publication Date : 2024-04-30
Article Type : Research
Abstract :Upon absorption of the sunlight, an excited energy state called exciton is generated in organic photovoltaics (OPV). There exist two kinds of excitons, singlet and triplet excitons. In OPV, the power conversion efficiency (PCE) is limited by the short lifetime of singlet excitons since they recombine quickly. To overcome this problem, we have introduced the spin ½ radical galvinoxyl into the MEH-PPV: PCBM bulk heterojunction to harvest triplets efficiently. The photovoltaic device shows an enhancement in PCE compared to the device without galvinoxyl. To reveal the underlying mechanism for the increase in PCE, magneto-photoconductance (MPC) of the OPVs was measured for the films, doped with various galvinoxyl concentration rates.Keywords : Organik fotovoltaik, Manyetik alan etkisi, Polimerler