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dc.contributor.authorSun, Shuangyongen
dc.contributor.authorSalim, Teddyen
dc.contributor.authorMathews, Nripanen
dc.contributor.authorDuchamp, Martialen
dc.contributor.authorBoothroyd, Chrisen
dc.contributor.authorXing, Guichuanen
dc.contributor.authorSum, Tze Chienen
dc.contributor.authorLam, Yeng Mingen
dc.identifier.citationSun, S., Salim, T., Mathews, N., Duchamp, M., Boothroyd, C., Xing, G., et al. (2013). The origin of high efficiency in low-temperature solution-processable bilayer organometal halide hybrid solar cells. Energy & environmental Science, 7(1), 399-407.en
dc.description.abstractThis work reports a study into the origin of the high efficiency in solution-processable bilayer solar cells based on methylammonium lead iodide (CH3NH3PbI3) and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM). Our cell has a power conversion efficiency (PCE) of 5.2% under simulated AM 1.5G irradiation (100 mW cm−2) and an internal quantum efficiency of close to 100%, which means that nearly all the absorbed photons are converted to electrons and are efficiently collected at the electrodes. This implies that the exciton diffusion, charge transfer and charge collection are highly efficient. The high exciton diffusion efficiency is enabled by the long diffusion length of CH3NH3PbI3 relative to its thickness. Furthermore, the low exciton binding energy of CH3NH3PbI3 implies that exciton splitting at the CH3NH3PbI3/PC61BM interface is very efficient. With further increase in CH3NH3PbI3 thickness, a higher PCE of 7.4% could be obtained. This is the highest efficiency attained for low temperature solution-processable bilayer solar cells to date.en
dc.relation.ispartofseriesEnergy & environmental scienceen
dc.rightsThis article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence.en
dc.subjectDRNTU::Engineering::Materials::Photonics and optoelectronics materialsen
dc.titleThe origin of high efficiency in low-temperature solution-processable bilayer organometal halide hybrid solar cellsen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
dc.contributor.researchEnergy Research Institute @ NTU (ERI@N)en
dc.description.versionPublished versionen
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