Nanomechanical Systems Research Division, KIMM (Korea Institute of Machinery and Materials), Daejeon 305-343, Republic of Korea.
Nanoscale. 2015 May 21;7(19):8829-34. doi: 10.1039/c5nr01508a.
A rapid increase in power conversion efficiencies in colloidal quantum dot (QD) solar cells has been achieved recently with lead sulphide (PbS) QDs by adapting a heterojunction architecture, which consists of small-area devices associated with a vacuum-deposited buffer layer with metal electrodes. The preparation of QD solar modules by low-cost solution processes is required to further increase the power-to-cost ratio. Herein we demonstrate all-solution-processed flexible PbS QD solar modules with a layer-by-layer architecture comprising polyethylene terephthalate (PET) substrate/indium tin oxide (ITO)/titanium oxide (TiO2)/PbS QD/poly(3-hexylthiophene) (P3HT)/poly(3,4-ethylenedioxythiophene) : poly(styrene sulfonate) (PEDOT : PSS)/Ag, with an active area of up to 30 cm(2), exhibiting a power conversion efficiency (PCE) of 1.3% under AM 1.5 conditions (PCE of 2.2% for a 1 cm(2) unit cell). Our approach affords trade-offs between power and the active area of the photovoltaic devices, which results in a low-cost power source, and which is scalable to larger areas.
最近，通过采用由小面积器件与真空沉积缓冲层和金属电极组成的异质结结构，在 PbS QD 上实现了胶体量子点 (QD) 太阳能电池的功率转换效率的快速提高。通过低成本溶液处理制备 QD 太阳能模块是进一步提高功率成本比所必需的。在此，我们展示了具有层状结构的全溶液处理的柔性 PbS QD 太阳能模块，该结构包括聚对苯二甲酸乙二醇酯 (PET) 基底/铟锡氧化物 (ITO)/氧化钛 (TiO2)/PbS QD/聚 (3-己基噻吩) (P3HT)/聚 (3,4-亚乙基二氧噻吩) ：聚 (苯乙烯磺酸盐) (PEDOT：PSS)/Ag，活性面积高达 30 cm2，在 AM 1.5 条件下的功率转换效率 (PCE) 为 1.3%（对于 1 cm2 的单元电池，PCE 为 2.2%）。我们的方法在光伏器件的功率和有效面积之间提供了权衡，从而提供了低成本的电源，并且可以扩展到更大的面积。
