Fully Solution‐Processed Small Molecule Semitransparent Solar Cells: Optimization of Transparent Cathode Architecture and Four Absorbing Layers. (26th April 2016)

• Record Type: Journal Article
• Authors: Min, Jie; Bronnbauer, Carina; Zhang, Zhi‐Guo; Cui, Chaohua; Luponosov, Yuriy N.; Ata, Ibrahim; Schweizer, Peter; Przybilla, Thomas; Guo, Fei; Ameri, Tayebeh; Forberich, Karen; Spiecker, Erdmann; Bäuerle, Peter; Ponomarenko, Sergei A.; Li, Yongfang; Brabec, Christoph J.
• Is Part Of: Advanced functional materials. Volume 26:Number 25(2016)
• Page Start: 4543
• Page End: 4550
• Publication Date: 2016-04-26
• Subjects: semitransparent solar cells -- building integrated photovoltaics -- small molecule -- interface bilayer -- power conversion efficiency; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201505411
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract : Semitransparent solar cells (SSCs) can open photovoltaic applications in many commercial areas, such as power‐generating windows and building integrated photovoltaics. This study successfully demonstrates solution‐processed small molecule SSCs with a conventional configuration for the presently tested material systems, namely BDTT‐S‐TR:PC70 BM, N(Ph‐2T‐DCN‐Et)3 :PC70 BM, SMPV1:PC70 BM, and UU07:PC60 BM. The top transparent cathode coated through solution processes employs a highly transparent silver nanowire as electrode together with a combination interface bilayer of zinc oxide nanoparticles (ZnO) and a perylene diimide derivative (PDINO). This ZnO/PDINO bilayer not only serves as an effective cathode buffer layer but also acts as a protective film on top of the active layer. With this integrated contribution, this study achieves a power conversion efficiency (PCE) of 3.62% for fully solution‐processed SSCs based on BDTT‐S‐TR system. Furthermore, the other three systems with various colors exhibited the PCEs close to 3% as expected from simulations, demonstrate the practicality and versatility of this printed semitransparent device architecture for small mole­cule systems. This work amplifies the potential of small molecule solar cells for window integration. Abstract : Small molecule semitransparent solar cells are successfully demonstrated with conventional structure using a zinc oxide nanoparticles and a perylene diimide with N‐oxide as electron extraction bilayer and silver nanowire as the top transparent electrode.