A Layered Hybrid Perovskite Solar‐Cell Absorber with Enhanced Moisture Stability1. (1st September 2014)

• Record Type: Journal Article
• Authors: Smith, Ian C.; Hoke, Eric T.; Solis‐Ibarra, Diego; McGehee, Michael D.; Karunadasa, Hemamala I.
• Is Part Of: Angewandte Chemie. Volume 126:Number 42(2014)
• Page Start: 11414
• Page End: 11417
• Publication Date: 2014-09-01
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201406466
• Languages: English
• ISSNs: 0044-8249

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>Two‐dimensional hybrid perovskites are used as absorbers in solar cells. Our first‐generation devices containing (PEA)₂(MA)₂[Pb₃I₁₀] (<bold>1</bold>; PEA=C₆H₅(CH₂)₂NH₃⁺, MA=CH₃NH₃⁺) show an open‐circuit voltage of 1.18 V and a power conversion efficiency of 4.73 %. The layered structure allows for high‐quality films to be deposited through spin coating and high‐temperature annealing is not required for device fabrication. The 3D perovskite (MA)[PbI₃] (<bold>2</bold>) has recently been identified as a promising absorber for solar cells. However, its instability to moisture requires anhydrous processing and operating conditions. Films of <bold>1</bold> are more moisture resistant than films of <bold>2</bold> and devices containing <bold>1</bold> can be fabricated under ambient humidity levels. The larger bandgap of the 2D structure is also suitable as the higher bandgap absorber in a dual‐absorber tandem device. Compared to <bold>2</bold>, the layered perovskite structure may offer greater tunability at the molecular level for material optimization.</p> </abstract>