Lin Y, Dlodlo RA, Shu Q, Lin H, Huang Q, Meng X, Zeng X, Chen Y, Xiao L.
Outcomes of a smoking cessation intervention at follow-up after 5 years among tuberculosis patients in China. TOBACCO INDUCED DISEASES. 2019;17.
Li Y, Qi X, Liu G, Zhang Y, Zhu N, Zhang Q, Guo X, Wang D, Hu H, Chen Z, et al. High performance of low-temperature processed perovskite solar cells based on a polyelectrolyte interfacial layer of PEI. ORGANIC ELECTRONICS. 2019;65:19-25.
Liu Y, Wang J, Zhang L, Liu W, Wu C, Liu C, Wu Z, Xiao L, Chen Z, Wang S.
Exciton and bi-exciton mechanisms in amplified spontaneous emission from CsPbBr3 perovskite thin films. OPTICS EXPRESS. 2019;27:29123-29131.
Wang D, Wu C, Luo W, Guo X, Qi X, Zhang Y, Zhang Z, Zhu N, Qu B, Xiao L, et al. To Greatly Reduce Defects via Photoannealing for High-Quality Perovskite Films. ACS APPLIED MATERIALS & INTERFACES. 2019;11:20943-20948.
Qi X, Liu G, Wang D, Zhu N, Zhang Y, Zhang Z, Wu C, Li X, Luo W, Li Y, et al. Stable power output (PCE > 19%) of planar perovskite solar cells with PbCl2 modification at the interface of SnO2/CH3NH3PbI3. ORGANIC ELECTRONICS. 2019;74:52-58.
Luo W, Wu C, Wang D, Zhang Z, Qi X, Guo X, Qu B, Xiao L, Chen Z.
Dopant-free Spiro-OMeTAD as hole transporting layer for stable and efficient perovskite solar cells. ORGANIC ELECTRONICS. 2019;74:7-12.
Zhang Q, Wu C, Qi X, Lv F, Zhang Z, Liu Y, Wang S, Qu B, Chen Z, Xiao L.
Photovoltage Approaching 0.9 V for Planar Heterojunction Silver Bismuth Iodide Solar Cells with Li-TFSI Additive. ACS APPLIED ENERGY MATERIALS. 2019;2:3651+.
Zhang Z, Wu C, Wang D, Liu G, Zhang Q, Luo W, Qi X, Guo X, Zhang Y, Lao Y, et al. Improvement of Cs2AgBiBr6 double perovskite solar cell by rubidium doping. ORGANIC ELECTRONICS. 2019;74:204-210.
Zhu N, Qi X, Zhang Y, Liu G, Wu C, Wang D, Guo X, Luo W, Li X, Hu H, et al. High Efficiency (18.53%) of Flexible Perovskite Solar Cells via the Insertion of Potassium Chloride between SnO2 and CH3NH3PbI3 Layers. ACS APPLIED ENERGY MATERIALS. 2019;2:3676+.
Luo W, Wu C, Wang D, Zhang Y, Zhang Z, Qi X, Zhu N, Guo X, Qu B, Xiao L, et al. Efficient and Stable Perovskite Solar Cell with High Open-Circuit Voltage by Dimensional Interface Modification. ACS APPLIED MATERIALS & INTERFACES. 2019;11:9149-9155.
Wu C, Wang D, Zhang Y, Gu F, Liu C, Zhu N, Luo W, Han D, Guo X, Qu B, et al. FAPbI(3) Flexible Solar Cells with a Record Efficiency of 19.38% Fabricated in Air via Ligand and Additive Synergetic Process. ADVANCED FUNCTIONAL MATERIALS. 2019;29.
Bian M, Chen Z, Qu B, Xiao L.
Highly Efficient Organic Blue Electroluminescent Materials and Devices with Mesoscopic Structures. CHEMICAL RECORD. 2019;19:1562-1570.
AbstractDue to the difficulty in achieving high efficiency and high color purity simultaneously, blue emission is the limiting factor for the performance and stability of OLEDs. Since 2003, we have been working on organic light-emitting diodes (OLEDs), especially on blue light. After a series of molecular designs, novel strategies have been proposed from different aspects. At first, highly efficient deep blue emission could be achieved through molecular design with highly twisted structure to suppress fluorescence quenching and redshift. Deep blue emitters with high efficiency in solid state, a twisted structure with aggregation induced emission (AIE) characteristics was incorporated to inhibit molecular aggregation, and triplet-triplet fusion (TTF) and hybridized localized charge transfer (HLCT) were adopted to increase the ratio of triplet exciton used. Secondly, a highly efficient blue OLED could be achieved through improving charge transport. New electron transport materials (ETMs) with wide band gap were developed to control charge transport balance in devices. Thirdly, a highly efficient deep blue emission could be achieved through a mesoscopic structure of out-coupling layer. A mesoscopic photonic structured organic thin film was fabricated on the top of metal electrode by self-aggregation in order to improve the light out-coupling efficiency.
Zhu N, Qi X, Zhang Y, Liu G, Wu C, Wang D, Guo X, Luo W, Li X, Hu H, et al. High Efficiency (18.53%) of Flexible Perovskite Solar Cells via the Insertion of Potassium Chloride between SnO2 and CH3NH3PbI3 Layers. ACS APPLIED ENERGY MATERIALS. 2019;2:3676+.
AbstractFlexible perovskite solar cells (PSCs) were ideal candidates for wearable devices due to the merits of flexibility, high efficiency, and being lightweight, and they could be fabricated in a continuous roll-to-roll production process to achieve large-area and low cost devices. Herein, the high efficiency (up to 18.53%) and fill factor (0.81) of flexible PSCs (ITO/SnO2/KCl/MAPbI(3)/spiro-OMeTAD/Ag) were achieved by low-pressure assisted solution processing under low temperature (<= 100 degrees C). The surface morphology and crystallinity of perovskite films were effectively promoted by the KCl modification and the defect density of perovskite films as well as the hysteresis of the corresponding devices was reduced accordingly. In addition, the stability and bendability of the KCl-modified flexible PSCs were improved simultaneously. To the best of our knowledge, both the efficiency and fill factor are the best among all flexible PSCs reported to date. Therefore, the insertion of KCl between SnO2 and MAPbI(3) layers provided a promising strategy for highly efficient flexible PSCs fabricated in low temperature (<= 100 degrees C) conditions.
Guo X, Bian M, Lv F, Wang Y, Zhao Z, Bian Z, Qu B, Xiao L, Chen Z.
Increasing electron transporting properties and horizontal molecular orientation via meta-position of nitrogen for ``(A)(n)-D-(A)(n)'' structured terpyridine electron-transporting material. JOURNAL OF MATERIALS CHEMISTRY C. 2019;7:11581-11587.
AbstractThe electron-transporting materials (ETMs) with excellent electron injection (EI) and electron transporting properties are prerequisites for highly efficient organic light-emitting diodes (OLEDs). In this work, we report a novel ETM, 2,7-di([3,2 `:6 `,3 `'-terpyridin]-4 `-yl)-9,9 `-spirobifluorene (27-mTPSF), which is synthesized by combining electron-withdrawing terpyridine (TPY) moieties with rigid twisted spirobifluorene. This rigid twisted structure helps to maintain the morphological stability of the amorphous film and contributes to the enhancement of the device lifetime. The nitrogen atom at the meta-position on the peripheral pyridine in 27-mTPSF can enhance the horizontal molecular orientation and the electron-transporting property. A green phosphorescent OLED (PhOLED) based on tris[2-(p-tolyl)pyridine]iridium(iii) (Ir(mppy)(3)) as the emitter and 27-mTPSF as ETM displayed a maximum external quantum efficiency (EQE) of 23.1%, and a half-life (T-50) of 77, 4330 and 243 495 h at an initial luminance of 10 000, 1000 and 100 cd m(-2), respectively, which are significantly superior to those of the device based on the conventional ETM 1,3,5-tris(N-phenylbenzimid azol-2-yl-benzene (TPBi). These results indicate a potential application for the ``(A)(n)-D-(A)(n)'' structured terpyridine ETMs.
Liu Y, Wang J, Zhang L, Liu W, Wu C, Liu C, Wu Z, Xiao L, Chen Z, Wang S.
Exciton and bi-exciton mechanisms in amplified spontaneous emission from CsPbBr3 perovskite thin films. OPTICS EXPRESS. 2019;27:29123-29131.
AbstractWe studied temperature-dependent amplified spontaneous emission (ASE) in CsPbBr3 perovskite thin films. For temperatures 180-360 K, a narrow-band lasing is observed. However, a new accompanying ASE band appears below 180 K, indicating a more complicated behavior. The two ASE bands are strongly correlated and in competition; they are assigned as exciton and bi-exciton recombination. We estimated the exciton binding energy (E-B = 27.3 meV) and that of the bi-exciton, which is lower than the E-B. The reduced effective mass of the exciton is estimated as mu = 0.11 m(c). This discovery identifies more details of the ASE phenomenon. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
