有机聚合物受体给体复合体薄膜光伏电池性能研究

提出了用一种新的有机物－聚合物复合体薄膜制备受体给体聚合物光伏电池的思路,用于克服由于激子或极化子扩散范围短而熄灭造成的电荷分离与传输效率低的缺陷.在采用对称N,N′-二苯并咪唑3,4,9,10-四羧酸二亚酰胺和聚(2,5-二十五烷氧基对－苯撑乙烯)(ROPPV)为原材料制备成复合体薄膜,对其电学、光学及用其制作的光伏电池的性能进行了讨论.结果显示了导电聚合物－有机物复合体可代表一类新的有机半导体材料用于制造光伏电池 关键词： 有机光伏电池 有机染料 共轭聚合物 异质结     

INCOHERENTLY COUPLED SCREENING-PHOTOVOLTAIC SOLITON FAMILIES IN BIASED PHOTOVOLTAIC PHOTOREFRACTIVE CRYSTALS

It is shown that the existence of incoherently coupled screening-photovoltaic soliton families is possible in biased photovoltaic photorefractive crystals under steady-state conditions. These screening-photovoltaic soliton families can be established provided the multiple incident beams have the same polarization and wavelength, and are mutually incoherent. Such soliton families reduce to screening-photovoltaic soliton pairs when they contain only two components. Relevant examples are presented where the photovoltaic photorefractive crystal is of the lithium niobate type.     

铼联吡啶系列光敏染料的合成

铼联吡啶配合物具有较高的氧化-还原电位及较好的光热稳定性,吸收可见光后可形成强的MLCT过渡态(Metal-to-Ligand Charge Transfer Transition),而且铼联吡啶配合物具有特殊的平面结构,使得染料分子可以呈现更加规则的有序排列,使其在纳米二氧化钛表面吸附的数量增加,提高对太阳能的吸收利用率,可用作Gratzel太阳能电池的光敏剂,为了研究配体上取代基团对铼联吡啶配合物结构和性能的影响,本文合成了吡啶环上分别带有甲基、羟基、氨基等不同供电子基团的铼联吡啶系列配合物1a,1b,1c,1d。     

Self-deflection of a bright soliton in a separate bright－dark spatial soliton pair based on a higher-order space charge field

The self-deflection of a bright solitary beam can be controlled by a dark solitary beam via a parametric coupling effect between the bright and dark solitary beams in a separate bright－dark spatial soliton pair supported by an unbiased series photorefractive crystal circuit. The spatial shift of the bright solitary beam centre as a function of the input intensity of the dark solitary beam (\hatρ) is investigated by taking into account the higher-order space charge field in the dynamics of the bright solitary beam via both numerical and perturbation methods under steady-state conditions. The deflection amount (Δs_0), defined as the value of the spatial shift at the output surface of the crystal, is a monotonic and nonlinear function of \hatρ. When \hatρ is weak or strong enough, Δs_0 is, in fact, unchanged with \hatρ, whereas Δs_0 increases or decreases monotonically with \hatρ in a middle range of \hatρ. The corresponding variation range (δs) depends strongly on the value of the input intensity of the bright solitary beam (r). There are some peak and valley values in the curve of δs versus r under some conditions. When \hatρ increases, the bright solitary beam can scan toward both the direction same as and opposite to the crystal's c-axis. Whether the direction is the same as or opposite to the c-axis depends on the parameter values and configuration of the crystal circuit, as well as the value of r. Some potential applications are discussed.     

受体型有机光伏材料苝二酰亚胺*

苝二酰亚胺作为一种典型的n型材料,具有可见光区强吸收、光和热稳定性较高等突出优点,近年来应用到有机光伏达电池中。本文介绍了苝二酰亚胺及其各种衍生物的结构和性质,综述了其用作有机光伏受体材料（包括小分子型苝二酰亚胺材料、含苝二酰亚胺受体单元的给体-受体双功能分子和含苝二酰亚胺受体单元的给体-受体双缆型聚合物材料）的最新研究进展。     

Diffusion-induced deflection and the effect of two-wave mixing gain on dissipative photovoltaic solitons

In an open-circuit dissipative photovoltaic (PV) crystal, by considering the diffusion effect, the deflection of bright dissipative photovoltaic (DPV) solitons has been investigated by employing numerical technique and perturbational procedure. The relevant results show that the centre of the optical beam moves along a parabolic trajectory, while the central spatial-frequency component shifts linearly with the propagation distance; furthermore, both the spatial deflection and the angular derivation are associated with the photovoltaic field. Such DPV solitons have a fixed deflection degree completely determined by the parameters of the dissipative system. The small bending cannot affect the formation of the DPV soliton via two-wave mixing.     

Electronic structure and defect states of transition films from amorphous to microcrystalline silicon studied by surface photovoltage spectroscopy

In this paper, surface photovoltage spectroscopy (SPS) is used to determine the electronic structure of the hydrogenated transition Si films. All samples are prepared by using helicon wave plasma-enhanced chemical vapour deposition technique, the films exhibit a transition from the amorphous phase to the microcrystalline phase with increasing temperature. The film deposited at lower substrate temperature has the amorphous-like electronic structure with two types of dominant defect states corresponding to the occupied Si dangling bond states (D⁰/D^- and the empty Si dangling states (D⁺). At higher substrate temperature, the crystallinity of the deposited films increases, while their band gap energy decreases. Meanwhile, two types of additional defect states is incorporate into the films as compared with the amorphous counterpart, which is attributed to the interface defect states between the microcrystalline Si grains and the amorphous matrix. The relative SPS intensity of these two kinds of defect states in samples deposited above 300\du increases first and decreases afterwards, which may be interpreted as a result of the competition between hydrogen release and crystalline grain size increment with increasing substrate temperature.     

共轭聚合物/C60复合体系及其在光伏打电池中的应用

共轭聚合物/C₆₀复合体系在有机太阳能电池中的应用引起了化学工作者的广泛兴趣.本文介绍了共轭聚合物/C₆₀复合体系的光诱导电子转移,以及近年来该体系在光伏打电池中的研究进展.     

基于多平台的线上实验教学——光伏发电驱动高效催化水分解制氢气虚拟仿真实验

在“以学生为中心”的核心思想和以能力为先的人才培养理念指导下,运用腾讯会议、虚拟仿真实验以及BLACKBOARD多样化平台,并辅以微信群构筑在线课堂,结合问题导学和探究互动教学方式,选择光伏发电驱动高效催化水分解制氢气作为开展线上教学的素材,为化学实验的线上教学提供案例参考。通过对在线实验教学的精准设计和过程实施,做到了教学课堂灵活可控,在提升学生的创新意识和科研素养方面进行了探索。     

环戊并二噻吩衍生物的合成及其应用

环戊并二噻吩衍生物作为一类具有刚性平面的类芴骨架结构的分子, 其光电材料衍生物由于具有带隙低、电导率高和良好的电荷传输性能等优点在塑料电子领域有着广泛的应用. 同时由于其易于进行结构修饰, 能够方便、快捷地引入各种功能基团, 可拓展合成多种衍生物. 依据环戊并二噻吩上噻吩S原子的位置不同, 可以将其分为6种构造异构体. 在这些构造异构体中, 目前关于4H-环戊[2,1-b:3,4-b']二噻吩衍生物的研究报道较多. 作者对4H-环戊[2,1-b:3,4-b']二噻吩衍生物的合成、性质及其在有机太阳能电池(OSCs)、有机场效应晶体管(OFETs)、有机发光二极管(OLEDs)等领域的研究进展进行了全面综述, 并对其有机半导体的格子化学进行了展望.