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

用纳米晶体墨水低温组装全无机太阳能电池。

• 批准号: 1236355
• 负责人: Mikhail Zamkov
• 金额: $ 30.25万
• 依托单位: Bowling Green State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2016-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1236355&HistoricalAwards=false
• 关键词: Low; temperature; assembly; inorganic; solar

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.

PI：Zamkov，MikhailPropossose编号：1236355机构：鲍林绿色州立大学Tittle：纳米晶墨水的全无机太阳能电池的低温组装。从纳米晶体的半导体薄膜的开发？依靠散装半导体的高效率和高温处理，成为传统膜沉积方法的强大替代方法。除了预期的成本降低外，解决方案加工的纳米晶体（NC）膜中的整合到设备架构中的启发是通过通过纳米颗粒大小调整NCS中电荷能量的可能性。这为操纵材料的光电特性和控制太阳能电池异质结构界面的电荷流速提供了额外的自由度。 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.从基本的前瞻性中，这项工作将为将纳米级物质的独特特性纳入散装材料所需的必要基础，并有可能导致展示新的功能和特性。 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 appearance 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设备。为了解决这个问题，该项目将超越传统的配体链接方案，并制定一种新的策略，将胶体半导体NC组装成全有机固体。为此，纳米晶体将粘合到另一种半导体材料的周围基质中，该基质旨在保留单个纳米颗粒的光电特性，同时使电荷的高迁移率和出色的产生固体的热/化学稳定性。矩阵中相邻的NC之间的距离将确定纳米颗粒间电耦合的程度，并将用于调整膜的电导率以增强电荷传输特性。同时，使用全有机矩阵将有助于抑制NC与外部环境的相互作用，从而提高设备稳定性。无机纳米晶膜的成功开发将导致纳米晶体固体的替代性，具有成本效益的结构，这将降低成本并有可能提高固态光电的功能。该创新可以在潜水场领域进行，包括太阳能生产，光催化，量子电子，环境科学和半导体行业。这项跨学科建议的教育方面将通过研究活动，心理，纳米技术专业研讨会和研究生课程开发来阐明学生。