%0 Journal Article %1 ADMA:ADMA201704418 %A Yang, Zhibin %A Rajagopal, Adharsh %A Jen, Alex K.-Y. %D 2017 %J Advanced Materials %K bandgap perovskite %P n/a--n/a %R 10.1002/adma.201704418 %T Ideal Bandgap Organic–Inorganic Hybrid Perovskite Solar Cells %U http://dx.doi.org/10.1002/adma.201704418 %X Extremely high power conversion efficiencies (PCEs) of ≈20–22% are realized through intensive research and development of 1.5–1.6 eV bandgap perovskite absorbers. However, development of ideal bandgap (1.3–1.4 eV) absorbers is pivotal to further improve PCE of single junction perovskite solar cells (PVSCs) because of a better balance between absorption loss of sub-bandgap photons and thermalization loss of above-bandgap photons as demonstrated by the Shockley–Queisser detailed balanced calculation. Ideal bandgap PVSCs are currently hindered by the poor optoelectronic quality of perovskite absorbers and their PCEs have stagnated at <15%. In this work, through systematic photoluminescence and photovoltaic analysis, a new ideal bandgap (1.35 eV) absorber composition (MAPb0.5Sn0.5(I0.8Br0.2)3) is rationally designed and developed, which possesses lower nonradiative recombination states, band edge disorder, and Urbach energy coupled with a higher absorption coefficient, which yields a reduced Voc,loss (0.45 V) and improved PCE (as high as 17.63%) for the derived PVSCs. This work provides a promising platform for unleashing the complete potential of ideal bandgap PVSCs and prospects for further improvement.

@article{ADMA:ADMA201704418, abstract = {Extremely high power conversion efficiencies (PCEs) of ≈20–22% are realized through intensive research and development of 1.5–1.6 eV bandgap perovskite absorbers. However, development of ideal bandgap (1.3–1.4 eV) absorbers is pivotal to further improve PCE of single junction perovskite solar cells (PVSCs) because of a better balance between absorption loss of sub-bandgap photons and thermalization loss of above-bandgap photons as demonstrated by the Shockley–Queisser detailed balanced calculation. Ideal bandgap PVSCs are currently hindered by the poor optoelectronic quality of perovskite absorbers and their PCEs have stagnated at <15%. In this work, through systematic photoluminescence and photovoltaic analysis, a new ideal bandgap (1.35 eV) absorber composition (MAPb0.5Sn0.5(I0.8Br0.2)3) is rationally designed and developed, which possesses lower nonradiative recombination states, band edge disorder, and Urbach energy coupled with a higher absorption coefficient, which yields a reduced Voc,loss (0.45 V) and improved PCE (as high as 17.63%) for the derived PVSCs. This work provides a promising platform for unleashing the complete potential of ideal bandgap PVSCs and prospects for further improvement.}, added-at = {2017-11-29T11:39:07.000+0100}, author = {Yang, Zhibin and Rajagopal, Adharsh and Jen, Alex K.-Y.}, biburl = {https://www.bibsonomy.org/bibtex/27da63d878a25250718b29b0ed48edfdd/fabianopkm}, description = {Ideal Bandgap Organic–Inorganic Hybrid Perovskite Solar Cells - Yang - 2017 - Advanced Materials - Wiley Online Library}, doi = {10.1002/adma.201704418}, interhash = {691040e761b4bfd3810ce7dc9048f91f}, intrahash = {7da63d878a25250718b29b0ed48edfdd}, issn = {1521-4095}, journal = {Advanced Materials}, keywords = {bandgap perovskite}, pages = {n/a--n/a}, timestamp = {2017-11-29T11:39:07.000+0100}, title = {Ideal Bandgap Organic–Inorganic Hybrid Perovskite Solar Cells}, url = {http://dx.doi.org/10.1002/adma.201704418}, year = 2017 }