Determination of Aging Processes of Perovskite Films Produced by Drop Casting Method by Electrical Characterization Techniques

Abstract

The most popular organic-hybrid solar cells are known to be perovskite solar cells with methyl ammonium lead iodide (MAPbI3) phase. This is due to the unique properties and high efficiency of perovskite solar cells. However, perovskite solar cells show a loss of efficiency shortly after their production. Production methods are cited as one of the reasons for this loss of efficiency. When perovskite production methods are examined, spin coating, thermal evaporation and thermal chemical vapor deposition (Thermal CVD) are seen as the most used methods. The drop casting method is seen as an effective method in the production of crystals locally. In this study, MAPbI3 films were produced by using chemical vapor deposition and drop casting methods together. The morphological and structural properties of the films obtained were determined by using SEM and XRD methods. The produced perovskite films were exposed to water vapor. Aging processes in materials due to water vapor have been characterized by electrical conductivity methods.

Keywords

• Drop casting
• Chemical Vapour Deposition
• Perovskite
• Thin film
• Ageing

Damla Döküm Yöntemi ile Üretilen Perovskit Filmlerin Yaşlanma Süreçlerinin Elektriksel Karakterizasyon Teknikleri ile Belirlenmesi

Abstract

Organik-hibrit güneş hücreleri arasında en popüler olan metil amonyum kurşun iyodür (MAPbI3) fazlı perovskit güneş hücreleridir. Bunun nedeni perovskit güneş hücrelerinin sahip oldukları eşsiz özellikler ve yüksek verimlilikleridir. Ancak perovskite güneş hücreleri üretimlerinden hemen sonra verimlilik kaybı yaşamaktadır. Üretim yöntemleri bu verimlilik kaybının nedenlerinden biri olarak gösterilmektedir. Perovskite üretim yöntemleri incelendiğinde spin kaplama, termal buharlaştırma ve termal kimyasal buhar biriktirme (Thermal CVD) en çok kullanılan yöntemler olarak görülmektedir. Damla döküm yöntemi ise bölgesel olarak kristal üretiminde etkili bir yöntem olarak görülmektedir. Bu çalışmada kimyasal buhar biriktirme ve damla döküm yöntemleri birlikte kullanılarak MAPbI3 filmler üretilmiştir. Elde edilen filmlerin morfolojik ve yapısal özellikleri SEM ve XRD yöntemleri kullanılarak belirlenmiştir. Üretilen perovskit filmler su buharına maruz bırakılmıştır. Su buharına bağlı olarak malzemelerde oluşan yaşlanma süreçleri elektriksel iletkenlik yöntemleri ile karakterize edilmiştir.

Keywords

• Damla döküm yöntemi
• Kimyasal buhar biriktirme
• Perovskit
• ince film
• Yaşlandırma

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