Details

Autor(en) / Beteiligte

• Zuo, Chuantian
• Scully, Andrew D.
• Vak, Doojin
• Tan, Wenliang
• Jiao, Xuechen
• McNeill, Christopher R.
• Angmo, Dechan
• Ding, Liming
• Gao, Mei

Titel

Self‐Assembled 2D Perovskite Layers for Efficient Printable Solar Cells

Ist Teil von

• Advanced energy materials, 2019-01, Vol.9 (4), p.n/a

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2019

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• 2D organic–inorganic hybrid Ruddlesden–Popper perovskites have emerged recently as candidates for the light‐absorbing layer in solar cell technology due largely to their impressive operational stability compared with their 3D‐perovskite counterparts. The methods reported to date for the preparation of efficient 2D perovksite layers for solar cells involve a nonscalable spin‐coating step. In this work, a facile, spin‐coating‐free, directly scalable drop‐cast method is reported for depositing precursor solutions that self‐assemble into highly oriented, uniform 2D‐perovskite films in air, yielding perovskite solar cells with power conversion efficiencies (PCE) of up to 14.9% (certified PCE of 14.33% ± 0.34 at 0.078 cm2). This is the highest PCE to date for a solar cell with 2D‐perovskite layers fabricated by nonspin‐coating method. The PCEs of the cells display no evidence of degradation after storage in a nitrogen glovebox for more than 5 months. 2D‐perovskite layer deposition using a slot‐die process is also investigated for the first time. Perovskite solar cells fabricated using batch slot‐die coating on a glass substrate or R2R slot‐die coating on a flexible substrate produced PCEs of 12.5% and 8.0%, respectively. A simple, spin‐coating‐free, and directly scalable drop‐cast method is developed to prepare 2D‐perovskite films at arbitrary shapes. The precursor solutions can self‐assemble into highly oriented 2D‐perovskite films on a preheated substrate, producing perovskite solar cells with power conversion efficiencies (PCE) of up to 14.9%, the highest PCE to date for a solar cell with 2D‐perovskite layers fabricated by a nonspin‐coating method.