Low-temperature assembly of all-inorganic solar cells from nanocrystal inks.

主要研究者：Zamkov，Mikhail提案编号：1236355机构：鲍林绿色州立大学标题：低温组装的全无机太阳能电池从硅。墨水？正在成为依赖于体半导体的高真空和高温处理的传统膜沉积方法的有力替代。除了预期的成本降低之外，将溶液处理的纳米颗粒（NC）膜集成到器件架构中的灵感来自于通过纳米颗粒尺寸调节NC中电荷能量的可能性。这为操纵材料提供了额外的自由度。的光电性能和控制电荷流率在异质结构界面的太阳能电池。该项目将开发一种从胶体半导体纳米晶体溶液中加工全无机太阳能电池的一般策略，使用基质封装方法生产异质外延/基质单片，预计将在溶液加工设备中显示出块状电导和引人注目的光伏能量转换。 从基本的角度来看，这项工作将奠定必要的基础，将纳米级物质的独特性质纳入大尺寸材料，可能导致新的功能和性质的演示。从材料制造的角度来看，这项工作将推进当前纳米粒子自组装的前沿，从而作为一个基准研究，以帮助正在进行的研究领域的NC设备。目前，使用半导体NC油墨的吸引力的低温（T 200 °C）太阳能电池的制造是妥协的表面配体的不稳定性，连接相邻的纳米晶体在这样的设备。 为了解决这个问题，该项目将超越传统的配体连接方案，并开发一种将胶体半导体NC组装成全无机固体的新策略。为此，纳米晶体将被结合到另一种半导体材料的周围基质中，旨在保持单个纳米颗粒的光电特性，同时实现电荷的高迁移率和所得固体的优异的热/化学稳定性。基质中相邻NC之间的距离将决定纳米颗粒间电耦合的程度，并将用于调节膜的电导以增强电荷传输特性。同时，使用全无机基质将有助于抑制NC与外部环境的相互作用，从而提高器件的稳定性。 无机纳米薄膜的成功开发将产生一种替代的、具有成本效益的纳米固体结构，这将降低成本，并可能改善固态光电子学的功能。这种创新可以在不同的领域得到利用，包括太阳能生产，量子电子学，环境科学和半导体工业。 这一跨学科建议的教育方面将侧重于通过研究活动，指导，纳米技术专门研讨会和研究生课程开发来阐明学生。

PI: Zamkov, MikhailProposal Number: 1236355Institution: Bowling Green State UniversityTitle: Low-temperature assembly of all-inorganic solar cells from nanocrystal inks.The development of semiconductor thin films from nanocrystal ?inks? is emerging as a powerful alternative to conventional methods of film deposition relying on high-vacuum and high-temperature processing of bulk semiconductors. In addition to the anticipated cost reduction, the integration of solution-processed nanocrystal (NC) films into device architectures is inspired by the possibility of tuning the energy of electrical charges in NCs via nanoparticle size. This opens up an additional degree of freedom for manipulating material?s optoelectronic properties and controlling charge flow rates at heterostructured interfaces in solar cells. The project will develop a general strategy for processing of all-inorganic solar cells from solutions of colloidal semiconductor nanocrystals, using a matrix- encapsulation approach to yield heteroepitaxial nanocrystal/matrix monoliths, expected to show a bulk-like electrical conductance and compelling photovoltaic energy conversion in solution-processed devices. From the fundamental prospective, this work will lay the necessary groundwork needed for incorporating the unique properties of matter at nanoscale into bulk-size materials, potentially leading to the demonstration of new functionalities and properties. From the material fabrication standpoint, this work will advance the current frontiers of nanoparticle self-assembly, thus serving as a benchmark study to aid the on-going research in the area of NC devices.At present, the appeal of employing semiconductor NC inks for low-temperature (T 200 °C) fabrication of solar cells is compromised by the instability of surface ligands, which link neighboring nanocrystals in such devices. To address this issue, the project will go beyond the traditional ligand-linking scheme and develop a novel strategy for assembling colloidal semiconductor NCs into all-inorganic solids. To this end, nanocrystals will be bonded into a surrounding matrix of another semiconductor material, designed to preserve optoelectronic properties of individual nanoparticles, while enabling high mobility of electrical charges and excellent thermal/chemical stability of resulting solids. The distance between adjacent NCs in the matrix will determine the degree of inter- nanoparticle electrical coupling and will be used to tune the conductance of the film towards enhancing the charge transport characteristics. Meanwhile, the use of all-inorganic matrices will help suppressing the interaction of NCs with external environment, thus giving rise to improved device stability. The successful development of inorganic nanocrystal films will result in an alternative, cost-effective architecture of nanocrystal solids, which will reduce the costs and potentially improve the functionality of solid state optoelectronics. This innovation can be harnessed in diverse fields, including solar energy production, photocatalysis, quantum electronics, environmental science, and semiconductor industry. The educational aspects of this interdisciplinary proposal will focus on elucidating students through research activities, mentoring, specialized workshops on nanotechnology, and graduate curriculum development.