Light intensity dependence of open-circuit voltage of polymer:fullerene solar cells

Koster, L. Jan Anton; Mihailetchi, V.D.; Ramaker, Robert; Blom, Paul W. M.

doi:10.1063/1.1889240

Cited by 1,235 publications

(906 citation statements)

References 20 publications

Supporting

Mentioning

865

Contrasting

Unclassified

Order By: Relevance

“…2c from the expected logarithmic relationship with intensity (which is proportional to J SC ) in Eq. (2) is a result of increased recombination due to heating [16,28]. The linear decrease of V OC with T (Fig.…”

Section: Discussionmentioning

confidence: 99%

Outdoor operation of small-molecule organic photovoltaics

Burlingame

Zanotti

Ciammaruchi

et al. 2017

Organic Electronics

View full text Add to dashboard Cite

a b s t r a c tWe measure the diurnal dependence of the operating characteristics of tetraphenyldibenzoperiflanthene (DBP):C 70 planar-mixed heterojunction small-molecule organic photovoltaic (OPV) cells with 2,2 0 ,2 00 -(1,3,5-benzenitryl tris-[1-phenyl-1H-benzimidazole] (TPBi):C 70 electron-filtering cathode buffer layers. Over the course of a day, efficiency gradually increases as a result of a concomitant increase in shortcircuit current, while the fill factor and open-circuit voltage remain constant. The results are analyzed on the basis of independent measurements of temperature-and intensity-dependent OPV performance. The power conversion efficiency is maximized slightly below 1 sun intensity and at 40 C, which is beneficial for practical outdoor operation. We attribute the increased short circuit current with temperature to broadening of the absorption spectrum due to population of phonon states along with increased charge mobility, which also results in an increase in fill factor.

show abstract

Section: Discussionmentioning

confidence: 99%

Outdoor operation of small-molecule organic photovoltaics

Burlingame

Zanotti

Ciammaruchi

et al. 2017

Organic Electronics

View full text Add to dashboard Cite

show abstract

“…38 condition. 39 Generally, a stronger light intensity dependent Voc with a slope larger than kT/q could be observed once monomolecular recombination becomes dominant, which is probably induced by interfacial traps. 39 As shown in …”

Section: Resultsmentioning

confidence: 96%

High Efficiency Inverted Organic Solar Cells with a Neutral Fulleropyrrolidine Electron-Collecting Interlayer

Yan

Kan

et al. 2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

A novel fulleropyrrolidine derivative, named as FPNOH, was designed, synthesized and utilized as an efficient electron-collecting (EC) layer for inverted organic solar cells (i-OSCs). The grafted diethanolamino-polar moieties can not only trigger its function as an EC interlayer, but also induce orthogonal solubility that guarantees subsequent multi-layer processing without interfacial mixing. A higher power conversion efficiency (PCE) value of 8.34% was achieved for i-OSC devices with ITO/FPNOH EC electrode, compared to that of the sol-gel ZnO based reference devices with an optimized PCE value of 7.92%. High efficiency exceeding 7.7% was still achieved even for the devices with a relatively thick PFNOH film (16.9 nm). It is worthwhile to mention that this kind of material exhibits less thickness dependent performance, in contrast to widely utilized p-type conjugated polyelectrolytes (CPEs) as well as the non-conjugated polyelectrolytes (NCPEs). Further investigation on illuminating intensity dependent parameters revealed the role of FPNOH in reducing interfacial traps-induced recombination at ITO/active layer interface.

show abstract

“…4.9b would require the calculation of the illumination-dependent open-circuit voltage, which can only be achieved by explicitly simulating the dynamics of charge generation and recombination [157,[159][160][161][162]. Targeting the open-circuit voltage as a function of charge density avoids simulation of recombination rates, mobilities and optical profiles.…”

Section: The Charge-density-dependent Open-circuit Voltagementioning

confidence: 99%

The (Non-)Local Density of States of Electronic Excitations in Organic Semiconductors

Poelking

2018

Springer Theses

View full text Add to dashboard Cite

The (Non-)Local Density of States of Electronic Excitations in Organic Semiconductors The rational design of organic semiconductors for optoelectronic devices relies on a detailed understanding of how their molecular and morphological structure condition the energetics and dynamics of charged and excitonic states. Investigating the role of molecular architecture, conformation, orientation and packing, this work reveals mechanisms that shape the spatially resolved densities of states in organic, small-molecular and polymeric heterostructures and mesophases. The underlying computational framework combines multiscale simulations of the material morphology at atomistic and coarse-grained resolution with a long-range-polarized embedding technique to resolve the electronic structure of the molecular solid. We show that longrange electrostatic interactions tie the energetics of microscopic states to the mesoscopic structure, with a qualitative and quantitative impact on charge-carrier level profiles across organic interfaces. The computational approach provides quantitative access to the charge-density-dependent opencircuit voltage of planar heterojunctions. The derived and experimentally verified relationships between molecular orientation, architecture, level profiles and open-circuit voltage rationalize the acceptor-donor-acceptor pattern for donor materials in high-performing solar cells. Proposing a pathway for barrier-less dissociation of charge transfer states, we highlight how mesoscale fields generate charge splitting and detrapping forces in systems with finite interface roughness. The associated design rules reflect the dominant role played by lowest-energy configurations at the interface. Acknowledgements 121 Die (nicht-)lokale Zustandsdichte elektronischer Anregungen in organischen Halbleitern List of Publications 123Bibliography 125 Chapter 1 Organic Electronics in a NutshellThe discovery of conductive polymers in the 1970s [1,2] -rewarded with the Nobel prize in chemistry in the year 2000 -and subsequent development of the first polymeric electronic devices in the 1980s [3-5] have marked the beginnings of a vast interdisciplinary research field referred to as organic electronics. Drawing from both polymeric and small-molecular semiconductors, organic thin-film transistors, solar cells, light-emitting diodes, photodetectors and sensors name just a few out of many applications that make use of the supreme chemical versatility and mechanical flexibility of the underlying "soft" molecular materials. Furthermore enabling low-temperature solution-based processing, printing and spray coating, organic electronics is set to complement the conventional silicon-based electronics in diverse waysadding functionality and improving sustainability. This introductory chapter will provide a short review of the materials and device physics, as well as of new trends and challenges that emerged in the field over the past decade. MaterialsOrganic semiconductors are molecular materials that exist at the interface between orga...

show abstract

Light intensity dependence of open-circuit voltage of polymer:fullerene solar cells

Cited by 1,235 publications

References 20 publications

Outdoor operation of small-molecule organic photovoltaics

Outdoor operation of small-molecule organic photovoltaics

High Efficiency Inverted Organic Solar Cells with a Neutral Fulleropyrrolidine Electron-Collecting Interlayer

The (Non-)Local Density of States of Electronic Excitations in Organic Semiconductors

Contact Info

Product

Resources

About