%0 Journal Article %1 li2018interface %A Li, Meng %A Zhao, Chao %A Wang, Zhao‐Kui %A Zhang, Cong‐Cong %A Lee, Harrison K. H. %A Pockett, Adam %A Barbé, Jérémy %A Tsoi, Wing Chung %A Yang, Ying‐Guo %A Carnie, Matthew J. %A Gao, Xing‐Yu %A Yang, Wen‐Xing %A Durrant, James R. %A Liao, Liang‐Sheng %A Jain, Sagar M. %D 2018 %I Wiley Online Library %J Advanced Energy Materials %K interfaces interlayer new_material perovskite %R 10.1002/aenm.201801509 %T Interface Modification by Ionic Liquid: A Promising Candidate for Indoor Light Harvesting and Stability Improvement of Planar Perovskite Solar Cells %U https://doi.org/10.1002/aenm.201801509 %X Organic–inorganic hybrid perovskite solar cells (PSCs) are currently attracting significant interest owing to their promising outdoor performance. However, the ability of indoor light harvesting of the perovskites and corresponding device performance are rarely reported. Here, the potential of planar PSCs in harvesting indoor light for low‐power consumption devices is investigated. Ionic liquid of 1‐butyl‐3‐methylimidazolium tetrafluoroborate (BMIMBF4) is employed as a modification layer of 6,6‐phenyl‐C61‐butyric acid methyl ester) (PCBM) in the inverted PSCs. The incorporation of BMIMBF4 not only paves the interface contact between PCBM and electrode, but also facilitates the electron transport and extraction owing to the efficient passivation of the surface trap states. Moreover, BMIMBF4 with excellent thermal stability can act as a protective layer by preventing the erosion of moisture and oxygen into the perovskite layer. The resulting devices present a record indoor power conversion efficiency (PCE) of 35.20% under fluorescent lamps of 1000 lux, and an impressive PCE of 19.30% under 1 sun illumination. The finding in this work verifies the excellent indoor performance of PSCs to meet the requirements of eco‐friendly economy. Ionic liquid of 1‐butyl‐3‐methylimidazolium tetrafluoroborate (BMIMBF4) is employed as a cathode modification and a protective layer to fabricate indoor perovskite solar cells. The resulting devices deliver an impressive power conversion efficiency (PCE) of 19.30% at 1 sun illumination, and a record indoor PCE of 35.20% under fluorescent lamp with 1000 lux, which is the highest value reported so far for indoor solar cells.

@article{li2018interface, abstract = {Organic–inorganic hybrid perovskite solar cells (PSCs) are currently attracting significant interest owing to their promising outdoor performance. However, the ability of indoor light harvesting of the perovskites and corresponding device performance are rarely reported. Here, the potential of planar PSCs in harvesting indoor light for low‐power consumption devices is investigated. Ionic liquid of 1‐butyl‐3‐methylimidazolium tetrafluoroborate ([BMIM]BF4) is employed as a modification layer of [6,6]‐phenyl‐C61‐butyric acid methyl ester) (PCBM) in the inverted PSCs. The incorporation of [BMIM]BF4 not only paves the interface contact between PCBM and electrode, but also facilitates the electron transport and extraction owing to the efficient passivation of the surface trap states. Moreover, [BMIM]BF4 with excellent thermal stability can act as a protective layer by preventing the erosion of moisture and oxygen into the perovskite layer. The resulting devices present a record indoor power conversion efficiency (PCE) of 35.20% under fluorescent lamps of 1000 lux, and an impressive PCE of 19.30% under 1 sun illumination. The finding in this work verifies the excellent indoor performance of PSCs to meet the requirements of eco‐friendly economy. Ionic liquid of 1‐butyl‐3‐methylimidazolium tetrafluoroborate ([BMIM]BF4) is employed as a cathode modification and a protective layer to fabricate indoor perovskite solar cells. The resulting devices deliver an impressive power conversion efficiency (PCE) of 19.30% at 1 sun illumination, and a record indoor PCE of 35.20% under fluorescent lamp with 1000 lux, which is the highest value reported so far for indoor solar cells.}, added-at = {2018-07-17T11:52:43.000+0200}, author = {Li, Meng and Zhao, Chao and Wang, Zhao‐Kui and Zhang, Cong‐Cong and Lee, Harrison K. H. and Pockett, Adam and Barbé, Jérémy and Tsoi, Wing Chung and Yang, Ying‐Guo and Carnie, Matthew J. and Gao, Xing‐Yu and Yang, Wen‐Xing and Durrant, James R. and Liao, Liang‐Sheng and Jain, Sagar M.}, biburl = {https://www.bibsonomy.org/bibtex/20e8652fd06b7215cb3914d35b8f6aea6/bretschneider_m}, doi = {10.1002/aenm.201801509}, interhash = {08875dcd73e7e1c54c1bc9be1aa3fbd1}, intrahash = {0e8652fd06b7215cb3914d35b8f6aea6}, issn = {1614-6832}, journal = {Advanced Energy Materials}, keywords = {interfaces interlayer new_material perovskite}, month = {7}, publisher = {Wiley Online Library}, timestamp = {2018-07-17T11:53:04.000+0200}, title = {Interface Modification by Ionic Liquid: A Promising Candidate for Indoor Light Harvesting and Stability Improvement of Planar Perovskite Solar Cells}, url = {https://doi.org/10.1002/aenm.201801509}, year = 2018 }