Details

Autor(en) / Beteiligte

• Wu, Jinyu
• Zhang, Lei
• Kang, Qiao
• Shi, Hongxi
• Li, Long
• Chi, Dan
• Huang, Shihua
• He, Gang

Titel

A Modified Sequential Deposition Route for High-Performance Carbon-Based Perovskite Solar Cells under Atmosphere Condition

Ist Teil von

• Molecules (Basel, Switzerland), 2022-01, Vol.27 (2), p.481

Ort / Verlag

Switzerland: MDPI AG

Erscheinungsjahr

2022

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Carbon-based hole transport material (HTM)-free perovskite solar cells have exhibited a promising commercialization prospect, attributed to their outstanding stability and low manufacturing cost. However, the serious charge recombination at the interface of the carbon counter electrode and titanium dioxide (TiO ) suppresses the improvement in the carbon-based perovskite solar cells' performance. Here, we propose a modified sequential deposition process in air, which introduces a mixed solvent to improve the morphology of lead iodide (PbI ) film. Combined with ethanol treatment, the preferred crystallization orientation of the PbI film is generated. This new deposition strategy can prepare a thick and compact methylammonium lead halide (MAPbI ) film under high-humidity conditions, which acts as a natural active layer that separates the carbon counter electrode and TiO . Meanwhile, the modified sequential deposition method provides a simple way to facilitate the conversion of the ultrathick PbI capping layer to MAPbI , as the light absorption layer. By adjusting the thickness of the MAPbI capping layer, we achieved a power conversation efficiency (PCE) of 12.5% for the carbon-based perovskite solar cells.