%0 Journal Article %1 doi:10.1021/acs.jpclett.7b02935 %A Patel, Jay B. %A Lin, Qianqian %A Zadvorna, Olga %A Davies, Christopher L. %A Herz, Laura M. %A Johnston, Michael B. %D 2018 %J The Journal of Physical Chemistry Letters %K perovskite precursors temperature %N 1 %P 263-268 %R 10.1021/acs.jpclett.7b02935 %T Photocurrent Spectroscopy of Perovskite Solar Cells Over a Wide Temperature Range from 15 to 350 K %U http://dx.doi.org/10.1021/acs.jpclett.7b02935 %V 9 %X Solar cells based on metal halide perovskite thin films show great promise for energy generation in a range of environments from terrestrial installations to space applications. Here we assess the device characteristics of the prototypical perovskite solar cells based on methylammonium lead triiodide (CH3NH3PbI3) over a broad temperature range from 15 to 350 K (−258 to 77 °C). For these devices, we observe a peak in the short-circuit current density and open-circuit voltage at 200 K (−73 °C) with decent operation maintained up to 350 K. We identify the clear signature of crystalline PbI2 contributing directly to the low-temperature photocurrent spectra, showing that PbI2 plays an active role (beyond passivation) in CH3NH3PbI3 solar cells. Finally we observe a blue-shift in the photocurrent spectrum with respect to the absorption spectrum at low temperature (15 K), allowing us to extract a lower limit on the exciton binding energy of 9.1 meV for CH3NH3PbI3.

@article{doi:10.1021/acs.jpclett.7b02935, abstract = { Solar cells based on metal halide perovskite thin films show great promise for energy generation in a range of environments from terrestrial installations to space applications. Here we assess the device characteristics of the prototypical perovskite solar cells based on methylammonium lead triiodide (CH3NH3PbI3) over a broad temperature range from 15 to 350 K (−258 to 77 °C). For these devices, we observe a peak in the short-circuit current density and open-circuit voltage at 200 K (−73 °C) with decent operation maintained up to 350 K. We identify the clear signature of crystalline PbI2 contributing directly to the low-temperature photocurrent spectra, showing that PbI2 plays an active role (beyond passivation) in CH3NH3PbI3 solar cells. Finally we observe a blue-shift in the photocurrent spectrum with respect to the absorption spectrum at low temperature (15 K), allowing us to extract a lower limit on the exciton binding energy of 9.1 meV for CH3NH3PbI3. }, added-at = {2018-01-08T13:51:41.000+0100}, author = {Patel, Jay B. and Lin, Qianqian and Zadvorna, Olga and Davies, Christopher L. and Herz, Laura M. and Johnston, Michael B.}, biburl = {https://www.bibsonomy.org/bibtex/263ed91c63a2f64ac24815d3cd533ddc6/cgoehler}, description = {Photocurrent Spectroscopy of Perovskite Solar Cells Over a Wide Temperature Range from 15 to 350 K - acs.jpclett.7b02935}, doi = {10.1021/acs.jpclett.7b02935}, eprint = {http://dx.doi.org/10.1021/acs.jpclett.7b02935}, interhash = {1181ddad55c4cc70ecfd73dbab328bb8}, intrahash = {63ed91c63a2f64ac24815d3cd533ddc6}, journal = {The Journal of Physical Chemistry Letters}, keywords = {perovskite precursors temperature}, note = {PMID: 29260569}, number = 1, pages = {263-268}, timestamp = {2018-01-08T13:51:41.000+0100}, title = {Photocurrent Spectroscopy of Perovskite Solar Cells Over a Wide Temperature Range from 15 to 350 K}, url = {http://dx.doi.org/10.1021/acs.jpclett.7b02935}, volume = 9, year = 2018 }