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| 1 | A new carbon phase with direct bandgap and high carrier mobility as electron transport material for perovskite solar cells显示文摘Rapid development of perovskite solar cells is challenged by the fact that current semiconductors hardly act as efficient electron transport materials that can feature both high electron mobility and a well-matched energy level to that of the perovskite.Here we show that T-carbon,a newly emerging carbon allotrope,could be an ideal candidate to meet this challenge.By using first-principles calculations and deformation potential theory,it is found that T-carbon is a semiconductor with a direct bandgap of 2.273 eV,and the energy level in the conduction band is lower than that of perovskite by 0.5 eV,showing a larger force of electron injection.Moreover,the calculated electron mobility can reach up to 2.36×10^(3) cm^(2) s^(–1) V^(–1),superior to conventional electron transport materials such as TiO2,ZnO and SnO2,which will facilitate more efficient electron separation and more rapid diffusion away from their locus of generation within the perovskite absorbers.Furthermore,the bandgap of T-carbon is highly sensitive to strain,thus providing a convenient method to tune the carrier transport capability.Overall,T-carbon satisfies the requirements for a potential efficient electron transport material and could therefore be capable of accelerating the development of perovskite solar cells. | Ping-Ping Sun Lichun Bai Devesh R.Kripalani Kun Zhou | 2019 | npj Computational Materials2019，，1： | 3 |
| 2 | 通过弱配位溶剂退火揭示钙钛矿薄膜生长机制(英文)显示文摘本研究在两步法沉积CH_3NH_3PbI_3和一步法沉积CsPbI_3薄膜过程中使用弱配位溶剂异丙醇(IPA)对钙钛矿及钙钛矿前驱体进行溶剂退火处理,从而揭示了钙钛矿薄膜的成核机理.同时研究了退火温度对两步法中PbI_2前驱体进行溶剂退火处理时的作用.发现IPA溶剂退火工艺严重影响了PbI_2和CH_3NH_3PbI_3薄膜的晶粒尺寸、致密度、粗糙度和薄膜形貌.相同的弱配位溶剂退火工艺也被应用于制备全无机CsPbI_3钙钛矿.通过溶剂退火可以得到具有均匀晶粒尺寸、连续致密的全无机CsPbI_3薄膜.我们认为弱配位溶剂退火工艺可以通过有效地调控钙钛矿中间相中的残留溶剂量来影响钙钛矿成膜中的再结晶过程.通过IPA溶剂退火工艺,CH_3NH_3PbI_3钙钛矿太阳能电池光电转换效率达到17.4%,而CsPbI_3的光电转换效率达到了2.5%. | 王亚飞 刘德涛 张鹏 张婷 WaseemAhmad 应翔霄 王峰 李健 陈力 巫江 陈志 李世彬 | 2018 | Science China Materials2018，61，12： | 2 |
| 3 | Flexible optoelectronic devices based on metal halide perovskites显示文摘The unique physical and chemical properties of metal halide perovskites predestine the devices to achieve high performance in optoelectronic field.Among the numerous high qualities of perovskites,their different low-temperature synthesis methods and preparation processes make them impressive and popular materials for flexible optoelectronic devices.Mainstream perovskite devices,for instance,solar cells,photodetectors and light-emitting diodes,have been fabricated on flexible substrates and show outstanding flexibility as well as high performance.For soft wearable electronic systems,mechanical flexibility is the premier condition.Compared to common devices based on rigid substrates,flexible perovskite devices are more practical and see widespread applications in energy,detection,display,and other fields.This review summarizes the recent progress of flexible perovskite solar cells,photodetectors and light-emitting diodes.The design and fabrication of different high-performance flexible perovskite devices are introduced.Various low-dimensional perovskite materials and configurations for flexible perovskite devices are presented.In addition,the limitations and challenges for further application are also briefly discussed. | Hao Chen Hao Wang Jiang Wu Feng Wang Ting Zhang Yafei Wang Detao Liu Shibin Li Richard V.Penty Ian H.White | 2020 | Nano Research2020，13，8： | 2 |
| 4 | Growth modulation of simultaneous epitaxy of ZnO obliquely aligned nanowire arrays and film on r-plane sapphire substrate显示文摘底层上的电影和 nanowire 数组的同时的取向附生的生长为 nanoscale 光电子具有科学意义和实际重要性。不过,在造的 situ 进行在在绝缘的底层上种的个别地孤立的 nanowires 之间的连接仍然是挑战性的。此处,我们在 Au 涂的 r 飞机蓝宝石底层上为 nonpolar 一飞机 ZnO 电影和倾斜地排列的 nanowire 数组的同时的取向附生的生长表明新奇、灵巧的策略。同样综合的 ZnO nanostructures 的形态学,结构,部件,和光性质用扫描电子显微镜学, X 光检查衍射,地排放传播电子显微镜学,精力散的光谱学, X 光检查光电子光谱学,和光致发光的地排放被调查光谱学。合作生长机制被建议: 催化Au 的蒸汽运输开始 nonpolar 一飞机和极的c飞机 ZnO 原子核的同现,并且随后,极的c飞机 ZnO 原子核同时开发进倾斜地排列的 nanowire 数组的 nonpolar 一飞机 ZnO 原子核在自我催化的 vapor-liquid-solid 生长帮助的底部和锌开发进一部 ZnO 传导性的电影的非向上的指导 Au 催化剂帮助。与传导性的连接和它在 nanowires 的 situ 合成认识到的建议策略能在光电子有益于 ZnO nanowires 的应用程序。 | Yongchun Xiao Yaoyao Tian Shujing sun Chenlong Chen Buguo Wang | 2018 | Nano Research2018，11，7： | 1 |
| 5 | Elucidation of thermally induced internal porosity in zinc oxide nanorods显示文摘 | Albertus D. Handoko Laura-Lynn Liew Ming Lin Gopinathan Sankar Yonghua Du Haibin Su Zhili Dong Gregory K. L. Goh | 2018 | Nano Research2018，11，5： | 0 |
| 6 | 基于水热反应制备SnO_(2)纳米棒阵列显示文摘采用水热反应制备一维SnO_(2)纳米棒阵列并表征其物相结构和微观形貌,研究了水热反应的核心工艺条件如前驱体浓度、反应时间、反应温度、反应次数以及前驱体中NaCl添加剂等对纳米棒阵列的生长和形貌的影响。结果表明:较低的前驱体浓度有利于制备大长径比的纳米棒;改变反应时间调控纳米棒的长度;改变反应温度和次数调控纳米棒的长度、直径和基底覆盖率;在前驱体中加入NaCl,可增强纳米棒的取向生长并降低其基底覆盖率。 | 杨高元 向文灏 刘德政 屈俊豪 梁英 李望南 徐可 钟杰 黄福志 陈美华 梁桂杰 | 2021 | 材料研究学报2021，35，4： | 0 |
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