Light Harvesting for Organic Photovoltaics
Reads0
Chats0
TLDR
The fundamental processes in photovoltaic devices are described, with the main emphasis on the characterization of energy transfer and its role in dictating device architecture, including multilayer planar heterojunctions, and on the factors that impact free carrier generation from dissociated excitons.Abstract:
The field of organic photovoltaics has developed rapidly over the last 2 decades, and small solar cells with power conversion efficiencies of 13% have been demonstrated. Light absorbed in the organic layers forms tightly bound excitons that are split into free electrons and holes using heterojunctions of electron donor and acceptor materials, which are then extracted at electrodes to give useful electrical power. This review gives a concise description of the fundamental processes in photovoltaic devices, with the main emphasis on the characterization of energy transfer and its role in dictating device architecture, including multilayer planar heterojunctions, and on the factors that impact free carrier generation from dissociated excitons. We briefly discuss harvesting of triplet excitons, which now attracts substantial interest when used in conjunction with singlet fission. Finally, we introduce the techniques used by researchers for characterization and engineering of bulk heterojunctions to realize la...read more
Citations
More filters
Journal ArticleDOI
Recent Advances in Flexible Perovskite Solar Cells: Fabrication and Applications
TL;DR: This Review focuses on recent progress in flexible perovskite solar cells concerning low‐temperature fabrication methods to improve the properties of perovkite films, such as full coverage, uniform morphology, and good crystallinity.
Journal ArticleDOI
Exciton Transport in Molecular Aggregates – From Natural Antennas to Synthetic Chromophore Systems
TL;DR: In this article, a review summarizes the theoretical background of the nature of the electronically excited states of molecular aggregates, and a brief overview is provided over experimental techniques that allow to study the properties of excitons in molecular aggregation.
Journal ArticleDOI
A universal layer-by-layer solution-processing approach for efficient non-fullerene organic solar cells
Rui Sun,Jing Guo,Chenkai Sun,Tao Wang,Zhenghui Luo,Zhuohan Zhang,Xuechen Jiao,Xuechen Jiao,Weihua Tang,Chuluo Yang,Chuluo Yang,Yongfang Li,Jie Min +12 more
TL;DR: In this article, a large-scale fabrication of layer-by-layer (LbL) OSCs using PTQ10/J71 as donors and ITC6-IC/IDIC/MeIC/ITCPTC/ITIC as non-fullerene acceptors is presented.
Journal ArticleDOI
All-Small-Molecule Nonfullerene Organic Solar Cells with High Fill Factor and High Efficiency over 10%
Beibei Qiu,Lingwei Xue,Lingwei Xue,Yankang Yang,Haijun Bin,Yindong Zhang,Yindong Zhang,Chunfeng Zhang,Chunfeng Zhang,Min Xiao,Min Xiao,Katherine Park,William Morrison,Zhi-Guo Zhang,Yongfang Li,Yongfang Li +15 more
TL;DR: In this paper, two wide bandgap A-D-A structured p-type organic semiconductor (p-OS) small molecules with weak electron-withdrawing ester end groups: SM1 with cyano group on the ester group and SM2 without the CN group.
Journal ArticleDOI
Coaxial Electrospinning Formation of Complex Polymer Fibers and their Applications
Daewoo Han,Andrew J. Steckl +1 more
TL;DR: A detailed review of the early history and current status of coaxial electrospinning can be found in this article, along with an in-depth discussion of various applications (biomedical, environmental, sensors, energy, catalysis, textiles).
References
More filters
Journal ArticleDOI
Polymer photovoltaic cells : enhanced efficiencies via a network of internal donor-acceptor heterojunctions
TL;DR: In this paper, the carrier collection efficiency and energy conversion efficiency of polymer photovoltaic cells were improved by blending of the semiconducting polymer with C60 or its functionalized derivatives.
Journal ArticleDOI
Zwischenmolekulare Energiewanderung und Fluoreszenz
TL;DR: In this article, a quantenmechanische behandlung des Ubergangs von Elektronenanregungsenergie zwischen gleichartigen Molekulen in Losung gegeben.
Journal ArticleDOI
Electron transfers in chemistry and biology
Rudolph A. Marcus,Norman Sutin +1 more
TL;DR: In this paper, the electron transfer reactions between ions and molecules in solution have been the subject of considerable experimental study during the past three decades, including charge transfer, photoelectric emission spectra, chemiluminescent electron transfer, and electron transfer through frozen media.