@misc{LaquaiAndrienkoDeibeletal.2017,
  author    = {Laquai, Frederic and Andrienko, Denis and Deibel, Carsten and Neher, Dieter},
  title     = {Charge carrier generation, recombination, and extraction in polymer-fullerene bulk heterojunction organic solar cells},
  series = {Elementary processes in organic photovoltaics},
  volume    = {272},
  journal   = {Elementary processes in organic photovoltaics},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-319-28338-8},
  issn      = {0065-3195},
  doi       = {10.1007/978-3-319-28338-8_11},
  pages     = {267 -- 291},
  year      = {2017},
  abstract  = {In this chapter we review the basic principles of photocurrent generation in bulk heterojunction organic solar cells, discuss the loss channels limiting their efficiency, and present case studies of several polymer-fullerene blends. Using steady-state and transient, optical, and electrooptical techniques, we create a precise picture of the fundamental processes that ultimately govern solar cell efficiency.},
  language  = {en}
}
@misc{WolffCaprioglioStolterfohtetal.2019,
  author    = {Wolff, Christian Michael and Caprioglio, Pietro and Stolterfoht, Martin and Neher, Dieter},
  title     = {Nonradiative Recombination in Perovskite Solar Cells},
  series = {Advanced materials},
  volume    = {31},
  journal   = {Advanced materials},
  number    = {52},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {0935-9648},
  doi       = {10.1002/adma.201902762},
  pages     = {20},
  year      = {2019},
  abstract  = {Perovskite solar cells combine high carrier mobilities with long carrier lifetimes and high radiative efficiencies. Despite this, full devices suffer from significant nonradiative recombination losses, limiting their V-OC to values well below the Shockley-Queisser limit. Here, recent advances in understanding nonradiative recombination in perovskite solar cells from picoseconds to steady state are presented, with an emphasis on the interfaces between the perovskite absorber and the charge transport layers. Quantification of the quasi-Fermi level splitting in perovskite films with and without attached transport layers allows to identify the origin of nonradiative recombination, and to explain the V-OC of operational devices. These measurements prove that in state-of-the-art solar cells, nonradiative recombination at the interfaces between the perovskite and the transport layers is more important than processes in the bulk or at grain boundaries. Optical pump-probe techniques give complementary access to the interfacial recombination pathways and provide quantitative information on transfer rates and recombination velocities. Promising optimization strategies are also highlighted, in particular in view of the role of energy level alignment and the importance of surface passivation. Recent record perovskite solar cells with low nonradiative losses are presented where interfacial recombination is effectively overcome-paving the way to the thermodynamic efficiency limit.},
  language  = {en}
}
@misc{MouleNeherTurner2014,
  author    = {Moule, Adam J. and Neher, Dieter and Turner, Sarah T.},
  title     = {P3HT-Based solar cells: structural properties and photovoltaic performance},
  series = {Advances in Polymer Science},
  volume    = {265},
  journal   = {Advances in Polymer Science},
  editor    = {Ludwigs, S},
  publisher = {Springer},
  address   = {Berlin},
  isbn      = {978-3-662-45145-8; 978-3-662-45144-1},
  issn      = {0065-3195},
  doi       = {10.1007/12_2014_289},
  pages     = {181 -- 232},
  year      = {2014},
  abstract  = {Each year we are bombarded with B.Sc. and Ph.D. applications from students that want to improve the world. They have learned that their future depends on changing the type of fuel we use and that solar energy is our future. The hope and energy of these young people will transform future energy technologies, but it will not happen quickly. Organic photovoltaic devices are easy to sketch, but the materials, processing steps, and ways of measuring the properties of the materials are very complicated. It is not trivial to make a systematic measurement that will change the way other research groups think or practice. In approaching this chapter, we thought about what a new researcher would need to know about organic photovoltaic devices and materials in order to have a good start in the subject. Then, we simplified that to focus on what a new researcher would need to know about poly-3-hexylthiophene: phenyl-C61-butyric acid methyl ester blends (P3HT: PCBM) to make research progress with these materials. This chapter is by no means authoritative or a compendium of all things on P3HT: PCBM. We have selected to explain how the sample fabrication techniques lead to control of morphology and structural features and how these morphological features have specific optical and electronic consequences for organic photovoltaic device applications.},
  language  = {en}
}
@misc{ShoaeeStolterfohtNeher2018,
  author    = {Shoaee, Safa and Stolterfoht, Martin and Neher, Dieter},
  title     = {The Role of Mobility on Charge Generation, Recombination, and Extraction in Polymer-Based Solar Cells},
  series = {dvanced energy materials},
  volume    = {8},
  journal   = {dvanced energy materials},
  number    = {28},
  publisher = {Wiley-VCH},
  address   = {Weinheim},
  issn      = {1614-6832},
  doi       = {10.1002/aenm.201703355},
  pages     = {20},
  year      = {2018},
  abstract  = {Organic semiconductors are of great interest for a broad range of optoelectronic applications due to their solution processability, chemical tunability, highly scalable fabrication, and mechanical flexibility. In contrast to traditional inorganic semiconductors, organic semiconductors are intrinsically disordered systems and therefore exhibit much lower charge carrier mobilities-the Achilles heel of organic photovoltaic cells. In this progress review, the authors discuss recent important developments on the impact of charge carrier mobility on the charge transfer state dissociation, and the interplay of free charge extraction and recombination. By comparing the mobilities on different timescales obtained by different techniques, the authors highlight the dispersive nature of these materials and how this reflects on the key processes defining the efficiency of organic photovoltaics.},
  language  = {en}
}