Spin Radikal Katkılama Yoluyla Organik Fotovoltaik Güneş Pillerinin Verimliliğinin Artırılması

Year 2024, Volume: 40 Issue: 1, 68 - 74, 30.04.2024

Kevser Şahin Tıraş

Abstract

Güneş ışığının absorbesi üzerine, organik fotovoltaiklerde (OPV) eksiton adı verilen uyarılmış bir enerji durumu oluşur. Singlet ve triplet eksitonlar olmak üzere iki tür eksiton vardır. OPV'de güç dönüşüm verimliliği (PCE), singlet eksitonların kısa ömürleri nedeniyle sınırlıdır, çünkü bunlar hızla rekombine olurlar. Bu sorunun üstesinden gelmek için, spin ½ radikali galvinoksili MEH-PPV: PCBM bulk heterojonksiyonuna dahil ederek tripletleri verimli bir şekilde elde ettik. Fotovoltaikler, galvinoxyl içermeyen cihaza kıyasla PCE'de artış göstermektedir. PCE'deki artışın altında yatan mekanizmayı ortaya çıkarmak için, OPV'lerin manyeto-fotokondüktansı (MPC), çeşitli galvinoksil konsantrasyon oranları ile katkılanmış filmler için ölçülmüştür.

Keywords

Organik fotovoltaik, Manyetik alan etkisi, Polimerler

Supporting Institution

Erciyes Üniversitesi

Project Number

FBA- 2022-11983

Efficiency Improvement of Organic Photovoltaic Solar Cells via Spin Radical Doping

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

Organic photovoltaics, Magnetic field effects, Polymers

Project Number

FBA- 2022-11983

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