Details

Autor(en) / Beteiligte

• Cho, Se-Phin
• Kwon, Sung-Nam
• Choi, Mi-Jung
• Seo, You-Hyun
• Kim, Seok-Soon
• Na, Seok-In

Titel

Enhanced Device Performances of MAFACsPb(I x Br1–x ) Perovskite Solar Cells with Dual-Functional 2‑Chloroethyl Acrylate Additives

Ist Teil von

• ACS applied materials & interfaces, 2020-10, Vol.12 (41), p.46846-46853

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2020

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Perovskite photovoltaics (PePVs) tend to suffer from a high density of defects that restrict the device in terms of performances and stability. Therefore, defect passivation and film-quality improvement of perovskite active layers are crucial for high-performance PePVs. In this work, 2-chloroethyl acrylate (CEA) with CO and −Cl groups in Cs0.175FA0.750MA0.075Pb (I0.880Br0.120) precursor solutions is introduced as a novel bifunctional additive to act as both a defect passivator and perovskite-growth controller. With the aid of CEA, the perovskite crystallinity and average grain size are improved, and perovskite defects are effectively reduced, thus increasing the representative efficiency (PCE = 19.32%). PePVs with CEA also maintain their initial efficiency of 85% even after about 500 h under air conditions with a humidity of 40 ± 5%. As a result, this study proves that the novel additive CEA can produce higher PePV efficiency and more stable devices.