1、Presenter：Xianjin GeGroup members：Xianjin Ge、 Yueyun Fang、 Kai Gao、Fuxing Lin、Meng Sun、Bing Tang、Mingyu Tong、Haojie Wang、Mengmeng ZhangTime：Dec. 25, 2015Preparation of Electron Transport Layer for Perovskite Solar CellIntroduction of Perovskite Solar Cell1 Preparation of Electron Transport Layer 2 L

2、ooking Forward3ContentPreparation of Electron Transport Layer for Perovskite Solar CellPart1.Introudction of Perovskite Solar CellbcdWorking Mechanism of Perovskite Solar cell The Advantages of Perovskite Solar cell aThe Current Situation of Solar Cell ResearchPerovskiteCrystalStructure a.The Curren

3、t Situation of Solar Cell Research National Renewable Energy Laboratory. Best Research-Cell Efficiencies, 2015; /ncpv/images/efficiency_chart.jpg.Sohrab Ahmadi Kandjani, Soghra Mirershadi and Arash Nikniaz. Chapter 8 of InorganicOrganic Perovskite Solar Cells. P225, Figure 3. b.Perovskite Crystal St

4、ructure A=Organic B=Pb or Sn X=halogen d.The Advantages of Perovskite Solar cell Strong solar absorptionLow non-radiative carrier recom-bination ratesHigher energy conversion efficienciesEase of fabricationPart2.Preparation of Electron Transport Layer abc TiO2 as electrontransport layersZnO nanopart

5、icles as electron transport layersSnO2nanoparticles as electrontransport layersM. Kim, B.J. Kim, J. Yoon.(2015). Electro-spray deposition of a mesoporous TiO2 charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells. Nanoscale,7,20725-20733a. Me

6、soporous TiO2 as electron transport layers Electrospray deposition（ ESD） Figure2. Comparison of glass deposited with mesoporous TiO2 layer by ESD before and afterM. Kim, B.J. Kim, J. Yoon.(2015). Electro-spray deposition of a mesoporous TiO2 charge collection layer: toward large scale and continuous

7、 production of high efficiency perovskite solar cells. Nanoscale,7,20725-20733a. Mesoporous TiO2 as electron transport layersSpin-coating and Electrospray deposition ProcessSEM Fill factorConversion efficiency0.6913.7%0.7415.1%M. Kim, B.J. Kim, J. Yoon.(2015). Electro-spray deposition of a mesoporou

8、s TiO2 charge collection layer: toward large scale and continuous production of high efficiency perovskite solar cells. Nanoscale,7,20725-20733a. Mesoporous TiO2 as electron transport layersConclusion (b)Electrosprayed TiO2 layer exhibits better performance, and PCE of devices can reach over 15%. mo

9、re porous structure low density of point defectslarge-area deposition performed continuouslyAdvantagesFabrication processhydrolysis of zinc acetate in methanol spin coated ZnO nanoparticles ITO spin coated PbI2 solution (dissolved in N,N-dimethylformamide) CH3NH3I solution (in 2-propanol) dipping in

10、to solution dry spiro-OMeTAD solutionthermal evaporationdeposition spin coated silvercollect precipitatesLiu, D., & Kelly, T. L. (2014). Perovskite solar cells with a planar heterojunction structure prepared using room-temperature solution processing techniques. Nature photonics, 8(2), 133-138.b. Zn

11、O nanoparticles as electron transport layers Liu, D., & Kelly, T. L. (2014). Perovskite solar cells with a planar heterojunction structure prepared using room-temperature solution processing techniques. Nature photonics, 8(2), 133-138. Liu, D., & Kelly, T. L. (2014). Perovskite solar cells with a pl

12、anar heterojunction structure prepared using room-temperature solution processing techniques. Nature photonics, 8(2), 133-138.b. ZnO nanoparticles as electron transport layers Liu, D., & Kelly, T. L. (2014). Perovskite solar cells with a planar heterojunction structure prepared using room-temperatur

13、e solution processing techniques. Nature photonics, 8(2), 133-138. Ke, W., Fang, G., Liu, Q., Xiong, L., Qin, P., Tao, H., . & Yang, G. (2015). Low-Temperature Solution Processed Tin Oxide as an Alternative Electron Transporting Layer for Efficient Perovskite Solar Cells. Journal of the American Che

14、mical Society.c. SnO2 nanoparticles as electron transport layersDevice architecture and energy levels diagram aETLbKe, W., Fang, G., Liu, Q., Xiong, L., Qin, P., Tao, H., . & Yang, G. (2015). Low-Temperature Solution Processed Tin Oxide as an Alternative Electron Transporting Layer for Efficient Per

15、ovskite Solar Cells. Journal of the American Chemical Society.a. Top-view SEM images of a SnO2 nanocrystalline film coated on FTO b . Crosssectional SEM image of the device.c. SnO2 nanoparticles as electron transport layersKe, W., Fang, G., Liu, Q., Xiong, L., Qin, P., Tao, H., . & Yang, G. (2015).

16、Low-Temperature Solution Processed Tin Oxide as an Alternative Electron Transporting Layer for Efficient Perovskite Solar Cells. Journal of the American Chemical Society.c. SnO2 nanoparticles as electron transport layersSummariesHigh electron mobility.Wide band gap.Low-temperature solution-processed

17、.The best-performing planar cell using a SnO2 ETL has achieved PCE of 17.21% and 14.82% when measured under reverse and forward voltage scans, respectively.Nanocrystalline SnO2 films have good antireflection property .Ke, W., Fang, G., Liu, Q., Xiong, L., Qin, P., Tao, H., . & Yang, G. (2015). Low-Temperature Solution Processed Tin Oxide as an Alternative Electron Transporting Layer for Efficient Perovskite Solar Cells. J