检索结果-南通市图书馆

第九届新型太阳能材料科学与技术学术研讨会

作者： Jintao Ren guangmei zhai Qing Chen Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education Taiyuan University of Technology

Herein we have systematically investigated the effect of reaction temperature(controlled by changing the temperature of ammonium salt solution in this work) on film quality and cell performance of single and mixed cation/halide perovskite systems, namely(FAPbI)(MAPbBr), FA MA PbI and MAPbI(FA: formamidine, CH(NH)) by means of absorption/photoluminescence spectroscopy, X-ray diffraction, scanning electron microscopy and various electrical measurements. The results show that an appropriate increase in the reaction temperature is favorable for obtaining high-quality perovskite films and improving cell performance,while an excessively high reaction temperature can cause the generation of non-perovskite phase and the reduction of cell performance. In addition, the mixed-cation/halide perovskite systems are more susceptible to reaction temperature relative to the single cation/halide perovskite with respect to phase purity and grain size. The optimal ammonium salt solution temperatures for preparing(FAPbI)(MAPbBr), FA MA PbI and MAPbI films and corresponding solar cells were found to be around 30, 30 and 55 ℃, respectively, in our two-step deposition process. The(FAPbI)(MAPbBr) based device prepared with ammonium precursor solution at 30 ℃ delivered the highest efficiency of 18.09%, which can be attributed to the reduced defect density in the perovskite film and the accelerated charge extraction at interfaces. This work highlights the distinct optimal reaction temperatures for different perovskite systems in the two-step deposition process and provides a simple thermodynamic regulation method to improve cell performance.

关键词： Perovskite solar cells "two-step" deposition film quality reaction temperature

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Perovskite crystallization and morphology regulation via the combination of solvent annealing and additive engineering for highly efficient perovskite solar cells

Perovskite crystallization and morphology regulation via the...

引用

第五届新型太阳能电池学术研讨会

作者： Zhimeng Shao Lulu Zheng Yong Zhang guangmei zhai Key Laboratory of Interface Science and Engineering in Advanced Materials (Taiyuan University of Technology) Ministry of Education CAS Key Laboratory of Renewable Energy

Inefficient conversion of Pb I2 to perovskite has always been a big issue when the conventional two-step method is applied to fabricate bilayered mesostructured and planar-structured perovskite solar cells. Here, we developed a new "solvent annealing" method to fabricate CHNHPbI perovskite thin films. By this method, both the perovskite conversion rate and film quality were successfully improved simultaneously. More importantly, it was found that adding a proper amount of additives into the CHNHI solution can further optimize the morphology of perovskite films. More dense and flat CHNHPbI films composed of larger grain size(around 800 nm) were obtained, and photovoltaic devices based on these films achieved an enhanced efficiency of 17.2%.Furthermore, the underlying mechanism of this novel method regarding perovskite crystallization and film morphology evolution is thoroughly studied via SEM, XRD and FTIR measurements. The method developed here would be beneficial to the development of the perovskite film and device preparation technology.

关键词： perovskite solar cells conversion rate additive crystallization morphology regulation

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Low-temperature Preparation and Performance of Perovskite Solar Cells

Low-temperature Preparation and Performance of Perovskite So...

引用

第四届新型太阳能电池学术研讨会

作者： Caifeng Zhang Wenhui Gao Zhimeng Shao Hua Zhang guangmei zhai Key Laboratory of Interface Science and Engineering in Advanced Materials of MoE Research Centre of Advanced Materials Science and Technology Taiyuan University of Technology

Although low-temperature, solution-processed zinc oxide(ZnO) has been widely adopted as the electron collection layer(ECL) in perovskite solar cells(PSCs) because of its simple synthesis and excellent electrical properties such as high charge mobility, the thermal stability of perovskite films deposited atop ZnO layers remains as a major ***, we report a strategy of low-temperature TiO

关键词： perovskite solar cells low-temperature TiO2 interfacial modification stability

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Improving Performance of ZnO-nanorods based Perovskite Solar Cells via Interface Regulation

Improving Performance of ZnO-nanorods based Perovskite Solar...

引用

第七届新型太阳能电池材料科学与技术学术研讨会

作者： Yong Zhang Lingwei Gao Qing Chen Jintao Ren guangmei zhai Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education Taiyuan University of Technology

The structure and properties of electron transport layers play an important role in determining device performance of perovskite solar cells(PSCs).PSCs based on one-dimensional ZnO nanorods still suffer from serious efficiency *** this work,length of ZnO nanorods was firstly optimized by exploring steady photoluminescence quenching of perovskite films deposited on ZnO nanorods of various lengths and their photovoltaic *** fabricated on ZnO nanorods of ～400 nm yield the best power conversion efficiency of ～10% due to their relatively balanced charge carrier transfer and transport *** this basis,sulfidation treatment was applied on these ZnO nanorods to further improve device *** is found that the sulfidation treatment of ZnO nanorods may play a role in at least three aspects:(I) passivating defects on the surface of ZnO nanorods;(II) facilitating charge carrier transfer and transport by forming ZnO/ZnS type II heterojunctions;(III) alleviating perovskite dissociation to some *** to these benefits,the power conversion efficiency of perovskite solar cells based on ZnO nanorods was improved to 11.72%,along with less *** work not only demonstrates the importance of rod-length and sulfidation treatment on device performance of perovskite solar cells based on ZnO nanorods but also provides a feasible method to improve their power conversion efficiency.

关键词： perovskite solar cells ZnO nanorods sulfidation treatment ZnO/ZnS heterojunction charge carrier transfer electron transport layers

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Tailoring perovskite conversion and grain growth by in situ solvent assisted crystallization and compositional variation for highly efficient perovskite solar cells

Tailoring perovskite conversion and grain growth by in situ ...

引用

第六届新型太阳能电池材料科学与技术学术研讨会

作者： Zhimeng Shao Lulu Zheng Yong Zhang Xudong Jin Lingwei Gao guangmei zhai Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education Taiyuan University of Technology

The performance of perovskite solar cell devices is strongly dependent on the morphology, crystallinity, and phase purity of perovskite films. However, the complete conversion of PbI into perovskite and tailoring perovskite grain growth as well as its surface morphology are challenging in the conventional two-step sequential deposition method. In this study, a facile and effective approach was developed to improve perovskite conversion rate and film quality via in situ solvent assisted crystallization(ISAC) and compositional adjustment. It was found that in the presence of in situ solvent molecules, CHNHI(MAI) molecules readily intercalated in the PbI lattice to form small-grain(～210 nm) MAPbI perovskite. By partially substituting MAI with a small amount of CH(NH)I(FAI), flat FAMAPbI films composed of much larger grains(～450 nm) could be obtained due to the in situ formation and decomposition of (MA)PbI(DMSO) intermediates. Photovoltaic devices based on ISAC-FAMAPbI films exhibited an –enhanced efficiency of 17.31% under AM 1.5 G solar illumination at 100 mW cm when compared to the devices based on ISAC-MAPbI films(14.30%), which can be mainly ascribed to the higher optical absorption and reduced defect density of the former. The results highlight the distinct effects of in situ solvent molecules on perovskite crystallization dynamics in various material systems and the importance of in situ solvent molecules in perovskite conversion, film morphology, and even device performance.

关键词： perovksite solar cells in situ solvent crystallization intermediates perovskite conversion

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Effect of potassium iodide on film quality and photovoltaic performance of perovskite solar cells fabricated via the two-step method

Effect of potassium iodide on film quality and photovoltaic ...

引用

第八届新型太阳能材料科学与技术学术研讨会

作者： GAO Lingwei REN Jintao CHEN Qing YUN Zhengkuan WU Zhixin GAO Yiwei WANG Beiheng zhai guangmei Key Laboratory of Interface Science and Engineering in Advanced Materials Taiyuan University of TechnologyMinistry of Education

In this work, we added different amounts(0, 0.001, 0.005, and 0.010 mol/L) of potassium iodide(KI) into the PbI/PbBr precursor solution dissolved in dimethylformamide and dimethyl sulfoxide solvent mixture to fabricate(MA)(FA)PbBr I perovskite films and solar cells(referred to as KI-0, KI-1, KI-5 and KI-10 films/devices) via the two-step method. The effects of KI on lead halide precursor, perovskite transformation, defect density and cell performance were investigated. Our results show that the introduction of appropriate amount of KI into the lead halide solution is conducive to the formation of iodide-rich iodoplumbates, which is beneficial to improving the crystallinity of lead halide and perovskite films and accelerating the transformation from lead halide to perovskite. When 0.005 mol/L of KI was added into the lead halide precursor, the defect density of the KI-5 film was reduced to 7.5×10 cm from 8.7×10 cm for the KI-0 film. Moreover, the photoelectric conversion efficiency was increased from 17.49% for the KI-0 device to 19.17% for the KI-5 device.

关键词： Perovskite solar cells Potassium iodide "Two-step" deposition Defect passivation Iodoplumbates

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Understanding the initial performance improvement of PbS quantum dot solar cells upon short-term air exposure

Understanding the initial performance improvement of PbS qua...

引用

第五届新型太阳能电池学术研讨会

作者： guangmei zhai Wenhui Gao Caifeng Zhang Zhimeng Shao Lulu Zheng Yong Zhang Yongzhen Yang Xuemin Li Xuguang Liu Bingshe Xu Key Laboratory of Interface Science and Engineering in Advanced Materials(Taiyuan University of Technology) Ministry of Education

An initial improvement in performance of PbS quantum dot solar cells composed of one thick layer of Pb S quantum dots(QDs) treated with tetrabutylammonium iodide(PbS-TBAI) and one thin layer of PbS QDs capped with 1,2-ethanedithiol(PbS-EDT) after short-term air exposure has been widely ***,the underlying mechanisms still remain *** the work,we sought to understand the mechanisms as well as their physicochemical origins using a combination of X-ray photoelectron spectroscopy(XPS) and various electronic *** is found that the PbS-TBAI film plays a dominant role in the initial device performance improvement compared with the PbS-EDT *** PbS-TBAI film is compensation doped upon short-term air exposure(one to three days) owing to the increase of Pb-O and/or Pb-OH species,enabling its energy band to align better with the electron transport layer for more efficient charge ***,it is demonstrated that the short-term air exposure is capable of reducing defects in the devices and improving the diode quality,resulting in the initial increase in device *** work contributes to the fundamental understanding of the surface chemistry changes of Pb S quantum dots treated by different ligands over air-exposure and the role of surface chemistry of quantum dots in optimizing their photovoltaic performance.

关键词： PbS quantum dot solar cells surface chemistry doping passivation stability

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

类金字塔状GaN微米结构的生长及其形貌表征

引用

材料导报 2017年第22期31卷 21-25页

作者：赵晨贾伟樊腾仝广运李天保翟光美马淑芳许并社太原理工大学新材料工程技术研究中心太原030024 太原理工大学新材料界面科学与工程教育部重点实验室太原030024

采用金属有机化学气相沉积(MOCVD)技术,在非掺杂GaN层上原位生长SiNx掩模层,制备了形貌可控的类金字塔状GaN微米结构,并系统研究了生长温度、生长时间、反应压力和Ⅴ/Ⅲ比等不同生长参数对其形貌的影响。研究结果表明,在生长温度为1 07... 详细信息

采用金属有机化学气相沉积(MOCVD)技术,在非掺杂GaN层上原位生长SiNx掩模层,制备了形貌可控的类金字塔状GaN微米结构,并系统研究了生长温度、生长时间、反应压力和Ⅴ/Ⅲ比等不同生长参数对其形貌的影响。研究结果表明,在生长温度为1 075℃时,所生长的GaN呈现出类金字塔状微米锥结构;当生长时间由3 min延长至20 min时,微米锥的底面直径由3.6μm增大到19.8μm,密度由3.8×10~3cm^(-2)降低至0.8×10~3cm^(-2);压力及Ⅴ/Ⅲ比共同决定该结构顶部的微观形貌(锥状或截顶锥状)。本工作的研究结果为GaN微钠米结构的原位可控生长奠定了一定基础,并有助于三维GaN基LED器件的进一步发展。

关键词：类金字塔状GaN微米结构金属有机化学气相沉积原位生长SiNx掩模层三维GaN基LED器件

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

ZnSe基蓝光量子点的中间壳层结构调控及其发光性能研究

引用

人工晶体学报 2024年第7期53卷 1160-1169页

作者：伍仕停余春燕方佳庆徐阳翟光美太原理工大学新材料界面科学与工程教育部重点实验室太原030024 太原理工大学材料科学与工程学院太原030024

ZnSe作为一种不含重金属的宽带隙量子点(QDs),近年来在蓝光量子点及其发光二极管器件领域受到广泛关注。然而,ZnSe基核壳结构蓝光量子点的核壳界面处通常存在较大的晶格失配,易于形成缺陷态捕获载流子,从而影响其光学性能。本文通过将... 详细信息

ZnSe作为一种不含重金属的宽带隙量子点(QDs),近年来在蓝光量子点及其发光二极管器件领域受到广泛关注。然而,ZnSe基核壳结构蓝光量子点的核壳界面处通常存在较大的晶格失配,易于形成缺陷态捕获载流子,从而影响其光学性能。本文通过将均质的单层ZnSeS合金层替换为具有组分渐变结构的ZnSeS合金层,合成了具有径向方向Se/S浓度渐变梯度的ZnSeS合金中间壳层的ZnSeTe/ZnSe/ZnSeS/ZnS量子点,并利用X射线衍射谱、稳态光致发光光谱、时间分辨发光光谱、透射电镜和电致发光测试等表征手段研究了不同合金中间壳层对量子点结构、形貌和光学性能的影响。结果表明,所合成的具有组分梯度ZnSeS壳层的量子点的发射波长均为深蓝色(444.5 nm),发射线宽窄(<18 nm),尺寸均一,具有闪锌矿结构,结晶度高;随着ZnSeS合金中间壳层沿量子点径向方向组分渐变平滑度的不断提高,量子点的荧光量子效率(PLQY)和色纯度等光学性质依次改善,其中通过S原子扩散形成的具有线性缓变ZnSeS壳层的量子点具有最窄的发射线宽(15.8 nm)和最高的PLQY(20.7%)。利用这种具有最优荧光性能的量子点作为发光材料制备的发光二极管器件的最大外量子效率为1.8%,最高亮度为750 cd/m^(2)。本研究提出的量子点合成方案和结构优化策略有助于促进高质量无毒蓝光ZnSe基核/壳量子点的发展。

关键词：无毒蓝光量子点核/壳结构梯度合金壳 ZnSe 量子点发光二极管发光性能

来源：

维普期刊数据库博看期刊

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

LiCl掺杂PEDOT∶PSS提高蓝光量子点发光二极管的性能

引用

液晶与显示 2024年第6期39卷 771-780页

作者：王艳林曹松余春燕周利通翟光美太原理工大学新材料界面科学与工程教育部重点实验室山西太原030024 太原理工大学材料科学与工程学院山西太原030024

基于全溶液制备的量子点发光二极管(QLEDs)通常存在电子-空穴注入不平衡的问题,严重地限制了蓝光QLEDs器件性能的提升。本文研究了不同浓度的金属卤化物(Li Cl)掺杂对聚(乙烯二氧噻吩)∶聚苯乙烯磺酸盐(PEDOT∶PSS)薄膜的形貌、导电率... 详细信息

基于全溶液制备的量子点发光二极管(QLEDs)通常存在电子-空穴注入不平衡的问题,严重地限制了蓝光QLEDs器件性能的提升。本文研究了不同浓度的金属卤化物(Li Cl)掺杂对聚(乙烯二氧噻吩)∶聚苯乙烯磺酸盐(PEDOT∶PSS)薄膜的形貌、导电率、透光性以及所制备QLEDs器件性能的影响规律。实验结果表明,Li Cl的掺杂浓度(质量分数)为2%时蓝光QLED器件性能的提升效果最佳,这主要归因于Li Cl掺杂后的PEDOT∶PSS薄膜导电率和透光性的增强以及器件中空穴注入效率的提高。相较于未掺杂的PEDOT∶PSS基QLED器件,基于Li Cl掺杂的蓝光QLED器件的最大亮度、峰值电流效率、峰值功率效率和峰值外量子效率分别从5 083 cd·m^(-2)、0.91 cd·A^(-1)、0.59 lm·W^(-1)和2.31%提升到7 451 cd·m^(-2)、1.38 cd·A^(-1)、0.89 lm·W^(-1)和3.51%。结果表明,采用Li Cl掺杂PEDOT∶PSS空穴注入层是提高蓝光QLED性能的一种有效策略。

关键词：蓝光量子点发光二极管 PEDOT∶PSS LiCl掺杂空穴注入层空穴注入

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：