學(xué)術(shù)報(bào)告會
應(yīng)材料與化學(xué)學(xué)院夏帆教授、侯書恩教授和靳洪允副教授邀請，華盛頓大學(xué)化學(xué)系David S. Ginger教授來我校交流并做學(xué)術(shù)報(bào)告。
報(bào)告時(shí)間：2017年12月10日下午15:30
報(bào)告地點(diǎn)：學(xué)海樓109學(xué)術(shù)報(bào)告廳
報(bào)告題目：Interface Control to Approach Solar Cell Efficiency Limits with Halide Perovskites
報(bào)告摘要：
Halide perovskites are currently of intense interest for solar energy and optoelectronic applications. Although remarkable gains in performance have been demonstrated in the past few years, most current devices are limited by non-radiative recombination losses. In this talk, I will focus on uncovering and eliminating these loss processes. Experiments suggests that electrical heterogeneities in both the perovskite active layer, as well as the perovskite/electrode interface, affect carrier diffusion and non-radiative recombination processes within perovskite solar cells. I will describe both confocal and conductive atomic force microscopy (cAFM) to explore the role of heterogeneities and grain boundaries on lateral carrier transport, and will demonstrate varying degrees of grain boundary opacity to carrier transport depending on the structure. We will also discuss both ligand exchange and cation exchange experiments in the context of tailoring the properties of halide perovskite thin films. We show that with controlled passivation of the perovskite surfaces we are able to obtain carrier lifetimes and PL intensities in solution-processed thin films that rival those in the best single crystals, achieving over 90% PL internal quantum efficiency and quasi-Fermi level splittings that exceed 96% of the Shockley-Queisser limit under illumination. Combining these results with experiments demonstrating contact-induced losses in many common perovskite architectures, we then explore new contact materials and their potential for increased efficiency.
報(bào)告人簡介：
David S. Ginger教授是華盛頓大學(xué)化學(xué)系A(chǔ)lvin L. and Verla R. Kwiram 教授，清潔能源研究院副院長、首席科學(xué)家，華盛頓清潔能源基金會杰出科學(xué)家。目前，擔(dān)任ACS Chemical Reviews（影響因子：47.93）、ACS Nano編委、ACS Photonics編委、Annual Review of Physical Chemistry編委，是American Association for the Advancement of Science的fellow，2016 Gordon Conference on Electronic Processes in Organic Materials大會主席。Ginger教授是pcAFM的開拓者、trEFM的發(fā)明者、光電太陽能的領(lǐng)軍者，主要從事光電材料及器件的研究，發(fā)表論文150余篇，其中，Science正刊3篇，Nature及子刊5篇，論文引用:>13,000次，H因子：>56.
歡迎全校師生參加！
材化院辦2017/12/5
