Molecular and Nanoscale Engineering of High Efficiency Excitonic Solar Cells

Jenekhe, Samson A.¹  Ginger, David S.¹  Cao, Guozhong¹ 

[1] Univ. of Washington, Seattle, WA (United States)

关键词: Excitonic solar cells;    polymer solar cells;    hybrid organic-inorganic solar cells;    organic semiconductors;    oxide semiconductor nanostructures;    nanoscale characterization;    bulk heterojunction devices;    photoinduced hole transfer;    photoinduced;   

DOI  :  10.2172/1235444
RP-ID  :  DOE-UW--46467
PID  :  OSTI ID: 1235444

学科分类：再生能源与代替技术

美国|英语

来源: SciTech Connect

【 摘 要 】

We combined the synthesis of new polymers and organic-inorganic hybrid materials with new experimental characterization tools to investigate bulk heterojunction (BHJ) polymer solar cells and hybrid organic-inorganic solar cells during the 2007-2010 period (phase I) of this project. We showed that the bulk morphology of polymer/fullerene blend solar cells could be controlled by using either self-assembled polymer semiconductor nanowires or diblock poly(3-alkylthiophenes) as the light-absorbing and hole transport component. We developed new characterization tools in-house, including photoinduced absorption (PIA) spectroscopy, time-resolved electrostatic force microscopy (TR-EFM) and conductive and photoconductive atomic force microscopy (c-AFM and pc-AFM), and used them to investigate charge transfer and recombination dynamics in polymer/fullerene BHJ solar cells, hybrid polymer-nanocrystal (PbSe) devices, and dye-sensitized solar cells (DSSCs); we thus showed in detail how the bulk photovoltaic properties are connected to the nanoscale structure of the BHJ polymer solar cells. We created various oxide semiconductor (ZnO, TiO₂) nanostructures by solution processing routes, including hierarchical aggregates and nanorods/nanotubes, and showed that the nanostructured photoanodes resulted in substantially enhanced light-harvesting and charge transport, leading to enhanced power conversion efficiency of dye-sensitized solar cells.