@article{dong_ho_yu_salehi_so_2019, title={Defect Passivation by Fullerene Derivative in Perovskite Solar Cells with Aluminum-Doped Zinc Oxide as Electron Transporting Layer}, volume={31}, ISSN={["1520-5002"]}, DOI={10.1021/acs.chemmater.9b01292}, abstractNote={ZnO is a potential replacement for TiO2 as an electron transport layer (ETL) used in low-temperature processed hybrid perovskite solar cells. However, poor thermal stability of perovskites on ZnO and interfacial traps introduced during processing are obstacles to achieve a good device performance. Here, we demonstrate perovskite solar cells using aluminum doped zinc oxide (AZO) nanoparticles for the ETL having a better thermal stability compared with ZnO. However, the device shows a lower short circuit current density and a large photocurrent hysteresis, which are attributed to the poor interfacial properties between the ETL and the perovskite layer. To address this issue, a thin interfacial modification layer of phenyl-C61-butyric acid methyl ester (PCBM) was employed. The resulting device shows the efficiency is improved from 13 to 17% along with a significant reduction in hysteresis. Results from our thermal admittance spectroscopy show that the interface defect states are significantly reduced with th...}, number={17}, journal={CHEMISTRY OF MATERIALS}, author={Dong, Qi and Ho, Carr Hoi Yi and Yu, Hyeonggeun and Salehi, Amin and So, Franky}, year={2019}, month={Sep}, pages={6833–6840} }
 @article{dong_fu_amoah_rozelle_shin_salehi_mendes_so_2019, title={Eliminate angular color shift in top-emitting OLEDs through cavity design}, volume={27}, ISSN={["1938-3657"]}, DOI={10.1002/jsid.792}, abstractNote={Abstract}, number={8}, journal={JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY}, author={Dong, Chen and Fu, Xiangyu and Amoah, Stephen and Rozelle, Adam and Shin, Dong-Hun and Salehi, Amin and Mendes, Juliana and So, Franky}, year={2019}, month={Aug}, pages={469–479} }
 @article{salehi_dong_shin_zhu_papa_thy bui_castellano_so_2019, title={Realization of high-efficiency fluorescent organic light-emitting diodes with low driving voltage}, volume={10}, ISSN={2041-1723}, url={http://dx.doi.org/10.1038/s41467-019-10260-7}, DOI={10.1038/s41467-019-10260-7}, abstractNote={Abstract}, number={1}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Salehi, Amin and Dong, Chen and Shin, Dong-Hun and Zhu, Liping and Papa, Christopher and Thy Bui, Anh and Castellano, Felix N. and So, Franky}, year={2019}, month={May} }
 @misc{salehi_fu_shin_so_2019, title={Recent Advances in OLED Optical Design}, volume={29}, ISSN={["1616-3028"]}, DOI={10.1002/adfm.201808803}, abstractNote={Abstract}, number={15}, journal={ADVANCED FUNCTIONAL MATERIALS}, author={Salehi, Amin and Fu, Xiangyu and Shin, Dong-Hun and So, Franky}, year={2019}, month={Apr} }
 @article{xu_yi_huang_zheng_zhang_salehi_coropceanu_ho_marder_toney_et al._2018, title={Donor Conjugated Polymers with Polar Side Chain Groups: The Role of Dielectric Constant and Energetic Disorder on Photovoltaic Performance}, volume={28}, ISSN={["1616-3028"]}, DOI={10.1002/adfm.201803418}, abstractNote={Abstract}, number={46}, journal={Advanced Functional Materials}, author={Xu, B. and Yi, X. and Huang, T. and Zheng, Z. and Zhang, J. and Salehi, A. and Coropceanu, V. and Ho, C.H.Y. and Marder, S.R. and Toney, M.F. and et al.}, year={2018}, pages={1803418} }
 @article{salehi_ho_chen_peng_yersin_so_2017, title={Highly Efficient Organic Light-Emitting Diode Using A Low Refractive Index Electron Transport Layer}, volume={5}, ISSN={["2195-1071"]}, DOI={10.1002/adom.201700197}, abstractNote={A low refractive index electron transport layer (ETL) can be very effective in enhancing the out‐coupling efficiency of an organic light‐emitting diode (OLED). However, most organic films show a refractive index close to 1.8. In this work, it has been discovered that tris‐[3‐(3‐pyridyl)mesityl]borane (3TPYMB) has a low refractive index of 1.65 (at 550 nm), which is the lowest refractive index ETL among the commonly used ETLs up to date. Using 3TPYMB as an ETL, a solution processed OLED is demonstrated with nearly a 76% enhancement in external quantum efficiency (EQE). Optical simulation results of this study show that 59% of the enhancement comes from the low refractive index 3TPYMB, and the remaining 17% from the change in charge balance due to the 3TPYMB ETL in the OLED devices.}, number={11}, journal={ADVANCED OPTICAL MATERIALS}, author={Salehi, Amin and Ho, Szuheng and Chen, Ying and Peng, Cheng and Yersin, Hartmut and So, Franky}, year={2017}, month={Jun} }
 @article{bullock_salehi_zeman_abboud_so_schanze_2017, title={In Search of Deeper Blues: Trans-N-Heterocyclic Carbene Platinum Phenylacetylide as a Dopant for Phosphorescent OLEDs}, volume={9}, ISSN={["1944-8244"]}, DOI={10.1021/acsami.7b12107}, abstractNote={A trans-N-heterocyclic carbene (NHC) platinum(II) acetylide complex bearing phenyl acetylene ligands (NPtPE1) has been synthesized via the Hagihara reaction in 64% yield. The complex features spectrally narrow deep blue emission with a phosphorescence quantum yield (0.30) and lifetime (∼10 μs) in the solid state. The modest quantum yield and lifetime make NPtPE1 a candidate for incorporation into an organic light emitting diode (OLED). Prototype devices exhibited a maximum EQE of 8% with CIE (0.20,0.20). To the best of our knowledge, this is the first example of a platinum(II) acetylide bearing NHC ligands to be incorporated into an OLED.}, number={47}, journal={ACS APPLIED MATERIALS & INTERFACES}, author={Bullock, James D. and Salehi, Amin and Zeman, Charles J. and Abboud, Khalil A. and So, Franky and Schanze, Kirk S.}, year={2017}, month={Nov}, pages={41111–41114} }
 @article{peng_salehi_chen_danz_liaptsis_so_2017, title={Probing the Emission Zone Length in Organic Light Emitting Diodes via Photoluminescence and Electroluminescence Degradation Analysis}, volume={9}, ISSN={["1944-8244"]}, DOI={10.1021/acsami.7b13537}, abstractNote={The understanding and control of the emission zone in organic light emitting diodes (OLEDs) is crucial to the device operational stability. Using the photoluminescence and electroluminescence degradation data, we have developed a modeling methodology to quantitatively determine the length of the emission zone and correlate that with the degradation mechanism. We first validate the modeling results by studying the emitter concentration effect on operational stability of devices using the well-studied thermal activated delayed fluorescent (TADF) emitter (4s,6s)-2,4,5,6-tetra(9H-carbazol-9-yl)isophthalonitrile (4CzIPN), and our results are consistent with previous published data. We further applied this methodology to study the emitter concentration effect using another TADF emitter, 4-carbazolyl-2-methylisoindole-1,3-dione (dopant 1). The results show that the emission zone of the dopant 1 devices is narrower than the 4CzIPN device, leading to faster degradation. While a higher emitter concentration does not result in widening of the emission zone, we were able to widen the emission zone and hence extend the device lifetime using a mixed host.}, number={47}, journal={ACS APPLIED MATERIALS & INTERFACES}, author={Peng, Cheng and Salehi, Amin and Chen, Ying and Danz, Michael and Liaptsis, Georgios and So, Franky}, year={2017}, month={Nov}, pages={41421–41427} }