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PbI_(2)对钙钛矿薄膜及太阳电池性能的影响
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作者 张欣 李艳敏 +5 位作者 吴瑞 段苹 孔乐 赵金良 邓金祥 孟军华 《微纳电子技术》 CAS 北大核心 2022年第8期742-750,共9页
碘化铅(PbI_(2))是两步法制备钙钛矿薄膜最常使用的金属卤化物前驱体,精确控制PbI_(2)在钙钛矿薄膜中的含量和空间分布以及优化PbI_(2)薄膜的形貌结构对于制备高效稳定的太阳电池具有重要意义。探索了PbI_(2)的浓度和退火方式对钙钛矿... 碘化铅(PbI_(2))是两步法制备钙钛矿薄膜最常使用的金属卤化物前驱体,精确控制PbI_(2)在钙钛矿薄膜中的含量和空间分布以及优化PbI_(2)薄膜的形貌结构对于制备高效稳定的太阳电池具有重要意义。探索了PbI_(2)的浓度和退火方式对钙钛矿薄膜及太阳电池性能的影响。研究发现,PbI_(2)溶液的浓度不仅决定钙钛矿薄膜中PbI_(2)的含量,也影响钙钛矿的晶粒尺寸、取向及光学吸收等性质,从而导致器件性能的改变,当钙钛矿薄膜表面分布约45%的PbI_(2)时器件性能更佳。此外,PbI_(2)的形貌、结晶性和孔隙度受退火方式的影响显著,与溶剂退火相比,通过短暂的1 min热退火制备的PbI_(2)薄膜更有利于减少钙钛矿表界面缺陷,提升器件的开路电压,最终使器件的基础光电转换效率(PCE)可以提升至20.89%。上述研究结果有助于进一步优化钙钛矿太阳电池制备工艺,提升器件性能。 展开更多
关键词 太阳电池 钙钛矿薄膜 碘化铅(pbi_(2)) 光电转换效率(PCE) 热退火
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SiO2 nanoparticle-regulated crystallization of lead halide perovskite and improved efficiency of carbon-electrode-based low-temperature planar perovskite solar cells
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作者 Zerong Liang Bingchu Yang +6 位作者 Anyi Mei Siyuan Lin Hongwei Han Yongbo Yuan Haipeng Xie Yongli Gao Conghua Zhou 《Chinese Physics B》 SCIE EI CAS CSCD 2020年第7期576-582,共7页
SiO2 nanoparticles were used to regulate the crystallizing process of lead halide perovskite films prepared by the sequential deposition method,which was used in the low-temperature-processed,carbon-electrode-basing,h... SiO2 nanoparticles were used to regulate the crystallizing process of lead halide perovskite films prepared by the sequential deposition method,which was used in the low-temperature-processed,carbon-electrode-basing,hole-conductor-free planar perovskite solar cells.It was observed that,after adding small amount of SiO2 precursor(1 vol%)into the lead iodide solution,performance parameters of open-circuit voltage,short-circuit current and fill factor were all upgraded,which helped to increase the power conversion efficiency(reverse scan)from 11.44(±1.83)%(optimized at 12.42%)to 14.01(±2.14)%(optimized at 15.28%,AM 1.5G,100 mW/cm^2).Transient photocurrent decay curve measurements showed that,after the incorporation of SiO2 nanoparticles,charge extraction was accelerated,while transient photovoltage decay and dark current curve tests both showed that recombination was retarded.The improvement is due to the improved crystallinity of the perovskite film.X-ray diffraction and scanning electron microscopy studies observed that,with incorporation of amorphous SiO2 nanoparticles,smaller crystallites were obtained in lead iodide films,while larger crystallites were achieved in the final perovskite film.This study implies that amorphous SiO2 nanoparticles could regulate the coarsening process of the perovskite film,which provides an effective method in obtaining high quality perovskite film. 展开更多
关键词 perovskite solar cell carbon-electrode CRYSTALLIZATION low temperature SIO2 lead iodide
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硫酸氢钾沉淀分离—2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚光度法测定矿石中铅 被引量:3
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作者 王冀艳 刘勉 +2 位作者 闫红岭 连文莉 张帆 《冶金分析》 CAS CSCD 北大核心 2016年第4期71-75,共5页
2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP)光度法应用于矿石中铅的测定时,Cu、Zn、Fe、Ni、Bi、Mn、Cd、Co、V、Ti、Nb和Ta等多种元素的干扰不容忽视。针对这一问题,实验提出了采用KHS04沉淀法对样品进行前处理,5-Br-PADA... 2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP)光度法应用于矿石中铅的测定时,Cu、Zn、Fe、Ni、Bi、Mn、Cd、Co、V、Ti、Nb和Ta等多种元素的干扰不容忽视。针对这一问题,实验提出了采用KHS04沉淀法对样品进行前处理,5-Br-PADAP光度法测定矿石中Pb的方法。实验表明,采用盐酸-硝酸体系溶解矿石后,加入1OmL200g/LKHS04溶液,放置2Omin后即可见样品中的铅沉淀完全从而与上述离子分离;将沉淀过滤后,采用pH5.6的HAc-NaAc缓冲溶液溶解沉淀,可使K2S04·PbS04复盐沉淀溶解,从而与Ba、W、Sr和Ca等元素分离。在样品溶液中依次加入0.4mLpH9.3H3B03-KCl-NaOH缓冲溶液、O.4mL饱和KI溶液、O.4mL1O%(V:V)TrionX-100溶液、1.0mLO.03g/L5-Br-PADAP乙醇溶液,于1crn比色皿中,在波长558nm处进行测定,Pb质量浓度在O.O2~2肚g/mL范围内符合比尔定律,线性回归方程的相关系数为0.998。方法检出限为O.02肚g/mL。采用实验方法分别对铅矿、锌矿、铅锌矿标准物质中的Pb进行分析,测得结果与认定值基本一致,相对标准偏差(RSD,n=11)为2.3%~5.8%。 展开更多
关键词 光度法 2-(5-溴-2-吡啶偶氮)-5-二乙氨基苯酚(5-Br-PADAP) 碘化钾 硫酸氢钾 礴石
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铅对体外培养HK-2细胞毒性及碘化钾的拮抗作用 被引量:1
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作者 周桂凤 刘栋 +3 位作者 乔玉峰 彭佑铭 杨波 蒋云生 《毒理学杂志》 CAS CSCD 北大核心 2008年第4期283-286,共4页
目的研究醋酸铅对人肾小管上皮细胞系HK-2细胞毒性剂量-反应关系及碘化钾(KI)的拮抗作用。方法体外培养HK-2细胞分为不同剂量染铅组:分别加入浓度为0,2.5,5,10,20和40μmol/L的醋酸铅;KI干预组:加入终浓度为40 mg/L的KI、37℃孵育30 mi... 目的研究醋酸铅对人肾小管上皮细胞系HK-2细胞毒性剂量-反应关系及碘化钾(KI)的拮抗作用。方法体外培养HK-2细胞分为不同剂量染铅组:分别加入浓度为0,2.5,5,10,20和40μmol/L的醋酸铅;KI干预组:加入终浓度为40 mg/L的KI、37℃孵育30 min后加入上述不同剂量的醋酸铅。染毒72 h后,利用噻唑蓝法(MTT)测定各组细胞的存活率;用相差显微镜观察细胞形态改变;Annexin-V/PI双染法检测细胞凋亡并用Hoechst33258染色、荧光显微镜观察细胞凋亡形态。结果细胞存活率与醋酸铅浓度存在剂量-反应关系(r=-0.878,P<0.01),其IC50为15.68μmol/L;低剂量铅组部分细胞形态拉长呈长梭形,随着铅剂量增加,细胞变小、变圆,直至无完整细胞形态、细胞成团,脱壁漂浮;与对照组(0μmol/L铅)比较,各种剂量铅染毒组HK-2细胞凋亡率明显增加(P<0.05),凋亡细胞核染色加深呈高亮蓝色、模糊、核明显固缩和碎裂;各剂量铅组加40 mg/L的KI,可使细胞存活率增加,IC50上升了3.33倍,细胞凋亡率下降,细胞形态改变明显改善。结论醋酸铅对HK-2细胞毒性存在明显剂量-反应关系,KI可部分拮抗铅的细胞毒性。 展开更多
关键词 碘化钾 HK-2细胞 细胞毒性 凋亡
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NaHCO_(3)-induced porous PbI_(2) enabling efficient and stable perovskite solar cells
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作者 Yitian Du Ying Wang +12 位作者 Jihuai Wu Qi Chen Chunyan Deng Ran Ji Liuxue Sun Lina Tan Xia Chen Yiming Xie Yunfang Huang Yana Vaynzof Peng Gao Weihai Sun Zhang Lan 《InfoMat》 SCIE CSCD 2023年第6期66-77,共12页
Driven by their many unique features,perovskite solar cells(PSCs)have become one of the most promising candidates in the photovoltaic field.Two-step preparation of perovskite film is advantageous for its higher stabil... Driven by their many unique features,perovskite solar cells(PSCs)have become one of the most promising candidates in the photovoltaic field.Two-step preparation of perovskite film is advantageous for its higher stability and reproducibility compared to the one-step method,which is more suitable for practical application.However,the incomplete conversion of the dense lead iodide(PbI_(2))layer during the sequential spin-coating of formamidinium/methylammonium(FA^(+)/MA^(+))organic amine salts severely affect the performance of PSCs.Herein,sodium bicarbonate(NaHCO_(3))is used to induce the formation of porous PbI_(2),which facilitates the penetration of the FA^(+)/MA^(+)ions and the formation of a perovskite film with high crystallinity and large grain microstructure.Meanwhile,the introduction of Na^(+)not only improves the energetic alignment of the PSC,but also increases the conductivity via p-doping.As a result,the optimized NaHCO_(3)-modified PSC achieves a champion power conversion efficiency of 24.0% with suppressed hysteresis.Moreover,the significant reduction in defect density and ion migration as well as a mild alkaline environment enhance the stability of device.The unencapsulated NaHCO_(3)-modified PSCs maintain over 90% of their original efficiency upon storage in ambient air(30%–40% relative humidity)for 2160 h.We have demonstrated an ingenious strategy for controlling the quality of perovskite and improving the performance of device by low-temperature foaming of simple inorganic molecules of NaHCO_(3). 展开更多
关键词 lead iodide(pbi_(2)) perovskite solar cell porous materials sodium bicarbonate(NaHCO_(3)) two-step deposition
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