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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 44: Hybrid, Organic and Perovskite Optoelectronics and Photovoltaics V

CPP 44.5: Vortrag

Donnerstag, 12. März 2026, 10:45–11:00, ZEU/LICH

Gas quenching under ambient condition for efficient and stable perovskite solar cells with surface passivation — •Zhaonan Jin¹, Xiongzhuo Jiang¹, Zerui Li¹, Xiaojing Ci¹, Guangjiu Pan¹, Lixing Li¹, Jinsheng Zhang¹, Xinyu Jiang², Sarathlal Koyiloth Vayalil^{2, 3}, Kun Sun⁴, Stephan V.Roth^{2, 5}, and Peter Müller-Buschbaum¹ — ¹TUM School of Natural Sciences, Chair for Functional Materials, Garching, Germany — ²DESY, Hamburg — ³UPES, India — ⁴HZB, Berlin — ⁵Department of Fibre and Polymer Technology, KTH, Stockholm, Sweden

Wide-bandgap perovskite solar cells play a key role in tandem solar cells, which aim to overcome the Shockley-Queisser limit for single-junction solar cells. In this work, we develop and optimize a gas quenching method under ambient conditions for the fabrication of wide-bandgap (1.77 eV) perovskite films. To improve the performance of PSCs, three different organic spacer cations, including aromatic amino molecules (PEAI), aliphatic amino with long alkyl chain molecules (OAI), and short alkyl chain molecules (BAI), are applied and investigated as surface passivation materials. As a result, the 2D perovskite layers form on top of 3D perovskite films. The n-i-p devices with PEAI passivation exhibit a champion PCE of 16.26% along with a high Voc of 1.21 V, exceeding the control device (PCE = 13.42%, Voc = 1.15 V), and maintaining 88% of its initial PCE after 120 minutes of continuous illumination. This work offers a guide for the fabrication of wide-bandgap PSCs under ambient conditions and the choice of organic spacer cations for passivation.

Keywords: Perovskite; PSCs; gas quenching; 2D perovskite; surface passivation