Nonfullerene organic solar cells(OSCs)have achieved breakthrough with pushing the efficiency exceeding 17%.While this shed light on OSC commercialization,high-performance flexible OSCs should be pursued through soluti...Nonfullerene organic solar cells(OSCs)have achieved breakthrough with pushing the efficiency exceeding 17%.While this shed light on OSC commercialization,high-performance flexible OSCs should be pursued through solution manufacturing.Herein,we report a solution-processed flexible OSC based on a transparent conducting PEDOT:PSS anode doped with trifluoromethanesulfonic acid(CF3SO3H).Through a low-concentration and low-temperature CF3SO3H doping,the conducting polymer anodes exhibited a main sheet resistance of 35Ωsq−1(minimum value:32Ωsq−1),a raised work function(≈5.0 eV),a superior wettability,and a high electrical stability.The high work function minimized the energy level mismatch among the anodes,hole-transporting layers and electron-donors of the active layers,thereby leading to an enhanced carrier extraction.The solution-processed flexible OSCs yielded a record-high efficiency of 16.41%(maximum value:16.61%).Besides,the flexible OSCs afforded the 1000 cyclic bending tests at the radius of 1.5 mm and the long-time thermal treatments at 85°C,demonstrating a high flexibility and a good thermal stability.展开更多
以γ-Al2O3为原料,炭黑(C)为还原剂,通过碳热还原氮化(carbothermal reduction and nitridation,CTRN)工艺合成了氮氧化铝(AlON)粉体,并通过气压烧结工艺制备了AlON透明陶瓷.借助X射线衍射分析研究了反应温度、保温时间及碳用量对CTRN...以γ-Al2O3为原料,炭黑(C)为还原剂,通过碳热还原氮化(carbothermal reduction and nitridation,CTRN)工艺合成了氮氧化铝(AlON)粉体,并通过气压烧结工艺制备了AlON透明陶瓷.借助X射线衍射分析研究了反应温度、保温时间及碳用量对CTRN反应产物相组成的影响,借助电子探针研究了AlON透明陶瓷的微观结构.研究结果表明:该反应主要受热力学控制,动力学因素也具有重要作用,反应温度和保温时间对AlON粉体的合成均具有重要影响.在1300℃时,开始发生CTRN反应;随着反应温度的升高,AlN的生成量逐渐增加;在1650℃时,开始形成AlON;在1700℃时,AlON的CTRN合成反应基本完成,产物中除含有极少量的AlN外,其余均为AlON相;进一步提高反应温度至1750℃,产物中残余AlN的量有所减少,但不能完全消除.采用CTRN工艺制备的粉体为原料,经1950℃高温气氛反应6h可制备出AlON透明陶瓷,材料微观结构致密、均匀,平均晶粒尺寸约50μm。展开更多
基金The authors acknowledge funding from the National Natural Science Foundation of China(61974150 and 51773213)Key Research Program of Frontier Sciences,CAS(QYZDB-SSW-JSC047)+1 种基金the Fundamental Research Funds for the Central Universities,the CAS-EU S&T cooperation partner program(174433KYSB20150013)the Natural Science Foundation of Ningbo(2018A610135).
文摘Nonfullerene organic solar cells(OSCs)have achieved breakthrough with pushing the efficiency exceeding 17%.While this shed light on OSC commercialization,high-performance flexible OSCs should be pursued through solution manufacturing.Herein,we report a solution-processed flexible OSC based on a transparent conducting PEDOT:PSS anode doped with trifluoromethanesulfonic acid(CF3SO3H).Through a low-concentration and low-temperature CF3SO3H doping,the conducting polymer anodes exhibited a main sheet resistance of 35Ωsq−1(minimum value:32Ωsq−1),a raised work function(≈5.0 eV),a superior wettability,and a high electrical stability.The high work function minimized the energy level mismatch among the anodes,hole-transporting layers and electron-donors of the active layers,thereby leading to an enhanced carrier extraction.The solution-processed flexible OSCs yielded a record-high efficiency of 16.41%(maximum value:16.61%).Besides,the flexible OSCs afforded the 1000 cyclic bending tests at the radius of 1.5 mm and the long-time thermal treatments at 85°C,demonstrating a high flexibility and a good thermal stability.
文摘以γ-Al2O3为原料,炭黑(C)为还原剂,通过碳热还原氮化(carbothermal reduction and nitridation,CTRN)工艺合成了氮氧化铝(AlON)粉体,并通过气压烧结工艺制备了AlON透明陶瓷.借助X射线衍射分析研究了反应温度、保温时间及碳用量对CTRN反应产物相组成的影响,借助电子探针研究了AlON透明陶瓷的微观结构.研究结果表明:该反应主要受热力学控制,动力学因素也具有重要作用,反应温度和保温时间对AlON粉体的合成均具有重要影响.在1300℃时,开始发生CTRN反应;随着反应温度的升高,AlN的生成量逐渐增加;在1650℃时,开始形成AlON;在1700℃时,AlON的CTRN合成反应基本完成,产物中除含有极少量的AlN外,其余均为AlON相;进一步提高反应温度至1750℃,产物中残余AlN的量有所减少,但不能完全消除.采用CTRN工艺制备的粉体为原料,经1950℃高温气氛反应6h可制备出AlON透明陶瓷,材料微观结构致密、均匀,平均晶粒尺寸约50μm。
