%0 Journal Article %1 ADFM:ADFM201504564 %A Yu, Zhenhua %A Chen, Bolei %A Liu, Pei %A Wang, Changlei %A Bu, Chenhao %A Cheng, Nian %A Bai, Sihang %A Yan, Yanfa %A Zhao, Xingzhong %D 2016 %J Advanced Functional Materials %K HoleConductionLayer perovskite %N 27 %P 4866--4873 %R 10.1002/adfm.201504564 %T Stable Organic–Inorganic Perovskite Solar Cells without Hole-Conductor Layer Achieved via Cell Structure Design and Contact Engineering %U http://dx.doi.org/10.1002/adfm.201504564 %V 26 %X Within the past few years, the record efficiency of inorganic–organic perovskite solar cell (PSC) has improved rapidly up to over 20%. However, the viability of commercialization of the PSC technology has been seriously questioned due to the moisture- and thermal-induced instabilities. Here, it is demonstrated that these issues may be mitigated via cell structure design and contact engineering. By employing the hole-conductor layer-free cell structure and a bi-layer back contact consisting of a carbon/CH3NH3I composite layer and a compact hydrophobic carbon layer, the PSCs have shown excellent stability, inhibiting moisture ingression and heat-induced perovskite degradation. It is found that, the unique bi-layer contact enables the optimization of perovskite absorbers during thermal stress. As a result, instead of degradation, the devices present enhanced performance under heating at 100 °C for 30 min. The best-performing cell shows a final efficiency of 13.6% from an initial efficiency of 11.3% after thermal stress. Upon encapsulation, these cells can even retain 90% of the initial efficiencies after water exposure and over 100% initial efficiency under thermal stress at 150 °C for half an hour. This approach provides a facile way for stabilizing the PSCs and opens a door for viable commercialization of the emerging PSC technology.

@article{ADFM:ADFM201504564, abstract = {Within the past few years, the record efficiency of inorganic–organic perovskite solar cell (PSC) has improved rapidly up to over 20%. However, the viability of commercialization of the PSC technology has been seriously questioned due to the moisture- and thermal-induced instabilities. Here, it is demonstrated that these issues may be mitigated via cell structure design and contact engineering. By employing the hole-conductor layer-free cell structure and a bi-layer back contact consisting of a carbon/CH3NH3I composite layer and a compact hydrophobic carbon layer, the PSCs have shown excellent stability, inhibiting moisture ingression and heat-induced perovskite degradation. It is found that, the unique bi-layer contact enables the optimization of perovskite absorbers during thermal stress. As a result, instead of degradation, the devices present enhanced performance under heating at 100 °C for 30 min. The best-performing cell shows a final efficiency of 13.6% from an initial efficiency of 11.3% after thermal stress. Upon encapsulation, these cells can even retain 90% of the initial efficiencies after water exposure and over 100% initial efficiency under thermal stress at 150 °C for half an hour. This approach provides a facile way for stabilizing the PSCs and opens a door for viable commercialization of the emerging PSC technology.}, added-at = {2016-07-20T13:48:25.000+0200}, author = {Yu, Zhenhua and Chen, Bolei and Liu, Pei and Wang, Changlei and Bu, Chenhao and Cheng, Nian and Bai, Sihang and Yan, Yanfa and Zhao, Xingzhong}, biburl = {https://www.bibsonomy.org/bibtex/2d8d747ff8bbee5202b86338642b90c32/cgoehler}, doi = {10.1002/adfm.201504564}, interhash = {e45b39dfa03813f2ddb3135f2e15cfc0}, intrahash = {d8d747ff8bbee5202b86338642b90c32}, issn = {1616-3028}, journal = {Advanced Functional Materials}, keywords = {HoleConductionLayer perovskite}, number = 27, pages = {4866--4873}, timestamp = {2016-07-20T13:48:25.000+0200}, title = {Stable Organic–Inorganic Perovskite Solar Cells without Hole-Conductor Layer Achieved via Cell Structure Design and Contact Engineering}, url = {http://dx.doi.org/10.1002/adfm.201504564}, volume = 26, year = 2016 }