X-ray microscopic investigation of molecular orientation in a hole carrier thin film for organic solar cells  

作　　者：Quentin Arnoux Benjamin Watts Sufal Swaraj Francois Rochet Ludovic Tortech 

机构地区：[1]Laboratoire de Chimie Physique Matiere et Rayonnement (LCPMR), UMR 7614, Sorbonne Universites, UPMC Univ Paris 06, Paris F-75005, France [2]Institut Parisien de Chimie Moleculaire (IPCM), UMR 8232, Sorbonne Universites, UPMC Univ Paris 06, Paris F-75005, France [3]Laboratoire d'Innovation en Chimie des Surfaces et Nanosciences (LICSEN), NIMBE UMR 3685, CEA Saday, Gif-sur-Yvette F-91191, France [4]Paul Scherrer Institute, Villigen Psi 5232, Switzerland [5]Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin, BP 48, Gif-sur-Yvette F-91192, France

出　　处：《Nano Research》2018年第5期2771-2782,共12页纳米研究（英文版）

摘　　要：As dipyranylidenes are excellent hole carriers, applications in organic solar cells or organic light emitting diode are envisaged. In the present study, we investigate the morphology of 2,2＇,6,6＇-tetraphenyl-4,4＇-dipyranylidene （DIPO-Ph4） deposited under vacuum on a silicon nitride （Si3N4） substrate, a paradigmatic system for the study of molecular crystal/inorganic substrate interfaces. Samples with various coating ratios and different thermal treatments were prepared. The films were characterized by atomic force microscopy and scanning transmission X-ray microscopy to gain insight into material growth. The results show a change in orientation at a molecular level depending upon the evaporation conditions. We are now able to tailor an organic layer with a specific molecular orientation and a specific electronic behavior.As dipyranylidenes are excellent hole carriers, applications in organic solar cells or organic light emitting diode are envisaged. In the present study, we investigate the morphology of 2,2＇,6,6＇-tetraphenyl-4,4＇-dipyranylidene （DIPO-Ph4） deposited under vacuum on a silicon nitride （Si3N4） substrate, a paradigmatic system for the study of molecular crystal/inorganic substrate interfaces. Samples with various coating ratios and different thermal treatments were prepared. The films were characterized by atomic force microscopy and scanning transmission X-ray microscopy to gain insight into material growth. The results show a change in orientation at a molecular level depending upon the evaporation conditions. We are now able to tailor an organic layer with a specific molecular orientation and a specific electronic behavior.

关 键 词：organic solar cells scanning transmission X-ray microscopy molecular orientation inorganic/organic interface 

分 类 号：TN912.15[电子电信—通信与信息系统] TM914.4[电子电信—信息与通信工程]