Radiation Laboratory and Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA.
ACS Nano. 2012 Jan 24;6(1):865-72. doi: 10.1021/nn204381g. Epub 2011 Dec 14.
A transformative approach is required to meet the demand of economically viable solar cell technology. By making use of recent advances in semiconductor nanocrystal research, we have now developed a one-coat solar paint for designing quantum dot solar cells. A binder-free paste consisting of CdS, CdSe, and TiO(2) semiconductor nanoparticles was prepared and applied to conducting glass surface and annealed at 473 K. The photoconversion behavior of these semiconductor film electrodes was evaluated in a photoelectrochemical cell consisting of graphene-Cu(2)S counter electrode and sulfide/polysulfide redox couple. Open-circuit voltage as high as 600 mV and short circuit current of 3.1 mA/cm(2) were obtained with CdS/TiO(2)-CdSe/TiO(2) electrodes. A power conversion efficiency exceeding 1% has been obtained for solar cells constructed using the simple conventional paint brush approach under ambient conditions. Whereas further improvements are necessary to develop strategies for large area, all solid state devices, this initial effort to prepare solar paint offers the advantages of simple design and economically viable next generation solar cells.
需要一种变革性的方法来满足经济可行的太阳能电池技术的需求。通过利用半导体纳晶研究的最新进展，我们现在已经开发出了一种用于设计量子点太阳能电池的单涂层太阳能涂料。制备了一种由 CdS、CdSe 和 TiO(2)半导体纳米粒子组成的无粘合剂糊剂，并将其涂覆到导电玻璃表面上，并在 473 K 下退火。在由石墨烯-Cu(2)S 对电极和硫/多硫化物氧化还原对组成的光电化学电池中评估了这些半导体薄膜电极的光电转换行为。用 CdS/TiO(2)-CdSe/TiO(2)电极获得了高达 600 mV 的开路电压和 3.1 mA/cm(2)的短路电流。使用简单的传统油漆刷方法在环境条件下构建的太阳能电池获得了超过 1%的功率转换效率。虽然还需要进一步改进以开发大面积、全固态器件的策略，但这种制备太阳能涂料的初步尝试提供了简单设计和经济可行的下一代太阳能电池的优势。
