纳米硫化铅增感的溴化银微晶中光电子衰减特性研究

doi:10.7517/j.issn.1674-0475.2006.01.9

影像科学与光化学 ›› 2006, Vol. 24 ›› Issue (1): 9-16.DOI: 10.7517/j.issn.1674-0475.2006.01.9

纳米硫化铅增感的溴化银微晶中光电子衰减特性研究

杨少鹏¹, 郑红芳¹, 傅广生¹, 李晓苇¹, 许春华², 李金培²

1. 河北大学, 物理科学与技术学院, 河北, 保定, 071002;
2. 中国科学院, 理化技术研究所, 北京, 100101

收稿日期:2005-07-15 修回日期:2005-09-30 出版日期:2006-01-23 发布日期:2006-01-23
通讯作者: 杨少鹏(1964-), 工学博士, 主要从事光电信息材料和激光光谱方面的研究.
基金资助:
国家自然科学基金(60478033,10354001,10274017);河北省博士基金(B2003119).

The Study of Decay Characteristics of Photoelectrons in Cubic AgBr Sensitized by PbS Nanoparticales

YANG Shao-peng¹, ZHENG Hong-fang¹, FU Guang-sheng¹, LI Xiaowei¹, XU Chun-hua², LI Jin-pei²

1. College of Physics Science and Technology, Hebei University, Baoding 071002, Hebei, P.R. China;
2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, P.R. China

Received:2005-07-15 Revised:2005-09-30 Online:2006-01-23 Published:2006-01-23

摘要/Abstract

摘要： 采用纳米硫化铅作为增感剂对边长为0.8μm的溴化银立方体颗粒进行了化学增感.利用微弱信号的微波吸收相敏检测技术,在超短脉冲激光作用下,获得了立方体溴化银乳剂中自由光电子和浅束缚光电子随增感时间变化的衰减曲线.通过测量溴化银光作用过程的时间分辨谱,讨论了卤化银晶体中电子陷阱对光电子运动行为的影响,分析了电子陷阱效应同增感时间之间的关系以及两个一级衰减区间寿命值同增感时间的关系.通过未增感样品与增感样品的衰减曲线对比,得到了在此实验条件下的最佳增感时间为60 min.

关键词: 微波吸收, 纳米硫化铅, 衰减时间, 电子陷阱

Abstract: PbS nanoparticales as a sensitizer is added to the 0.8 μm cubic silver bromide emulsion for the chemical sensitization. Under illuminated by pulse laser, the decay characteristics of free photo-electrons and shallow-trapped electrons in the cubic silver bromide emulsion sensitized by PbS nanoparticales with the continuous increase of sensitization time are obtained by using the microwave absorption and dielectric spectrum measure technique. The influence of electron traps in silver bromide microcrystal, on the behavior of the photoelectron’ s movement is discussed. The relationship between the effects of electron traps and sensitization time is analyzed. By the contrast of the decay characteristics between the unsensitized sample and the sensitized samples, the optimum sensitizing-time on this experiment condition is 60 min.

Key words: microwave absorption, PbS nanoparticales, decay time, electron trap

中图分类号:

TQ57

杨少鹏, 郑红芳, 傅广生, 李晓苇, 许春华, 李金培. 纳米硫化铅增感的溴化银微晶中光电子衰减特性研究[J]. 影像科学与光化学, 2006, 24(1): 9-16.

YANG Shao-peng, ZHENG Hong-fang, FU Guang-sheng, LI Xiaowei, XU Chun-hua, LI Jin-pei. The Study of Decay Characteristics of Photoelectrons in Cubic AgBr Sensitized by PbS Nanoparticales[J]. Imaging Science and Photochemistry, 2006, 24(1): 9-16.

参考文献

[1] Fu G S,Yang S P,Li X W,et al.The dynamic characteristics of sulfur sensitization centers in T-grain AgBrI microcrystals[J].Journal of Applied Physics,2004,96(9):5373-5375.
[2] 李金培,唐竁骜,王素娥.纳米尺寸ZnS化学增感剂[J].感光科学与光化学,2001,19(4):241-243.Li J P,Tang M A,Wang S E.Nanosized ZnS chemical sensitizer[J].Photographic Science and Photochemistry,2001,19(4):241-243.
[3] De Rycke,et al.Silver sulphide sol with ultrafine particle size[P].US patent,5 167 875.1992-12-01.
[4] Masutomi,et al.Ultrafine gold and/or silver chalcogenide and production thereof[P].US patent,5 362 470.1994-11-08.
[5] 许春华,李金培,等.纳米尺寸硫化镍化学增感剂[J].感光科学与光化学,2002,20(5):321-325.Xu C H,Li J P,et al.Nanosized NiS chemical sensitizer[J].Photographic Science and Photochemistry,2002,20(5):321-325.
[6] 许春华,李金培.PbS纳米微粒对溴化银微晶乳剂的化学增感作用[J].感光科学与光化学,2004,22(5):343-349.Xu C H,Li J P.Chemical sensitization of the silver bromide microcrystal[J].Photographic Science and Photochemistry,2004,22(5):343-349.
[7] 董国义,李晓苇,韦志仁,杨少鹏.微波吸收法研究Mn,Cu掺杂对ZnS:Mn,Cu光生载流子复合过程的影响[J].物理学报,2003,52(3):745-749.Dong G Y,Li X W,Wei Z R,Yang S P.Investigation of influences of concentration of Mn and Cu dopants on the decay process of photogenerated charge carriers in the ZnS:Mn,Cu Iuminescence materials[J].Acta.Phys.Sin.,2003,52(3):745-749.
[8] Yang S P,Fu G S,Dai X H,et al.Investigation of photoelectron temporal characteristics in silver halide microcrystals using the microwave absorption technique[J].Chin.Phys.,2004,13(8):1326-1329.
[9] Yang S P,Fu G S,Dong G Y,et al.Investigation of the photoelectron decay of silver halide microcrystal[J].Chin.Phys.,2003,12(12):1435-1439.
[10] Keevert J E,Gokhale V V.A study of reaction and aggregation steps in sulfur sensitization and the role of tetraazaindene[J].J.Imaging Sci.,1987,31:243-249.
[11] Kanzaki H,Tadakuma Y.Electronic processes in chemically-sensitized emulsion grains of silver bromide[J].J.Phys.Chem.Solids,1994,55:631.
[12] Tani T.Characterization of sensitization centers and fog centers formed during digestion for sulfur sensitization[J].J.Imaging Sci.Technol.,1996,39:386-392.
[13] Tani T.Comprehensive model for sulfur sensitization (2):characterization of sulfur sensitization centers and fog centers[J].J.Imaging Sci.Technol.,1998,42:135-143.
[14] Tani T,Yoshida Y.Comprehensive model for sulfur sensitization Ⅲ:sulfur-plus-gold sensitization[J].J.Imaging Sci.Technol.,2000,44:242-249.
[15] 杨少鹏,傅广生,李晓苇,田晓东.AgBrI微晶上硫增感中心Ag₂S分子团簇的陷阱效应分析[J].中国科学G辑,物理,力学,天文学,2004,34(5):540-548.Yang S P,Fu G S,Li X W,Tian X D.The trapping effect of sulfur sensitization center Ag₂S cluster on T-grain AgBrI microcrystals[J].Science in China Ser.G,Physics,Mechanics & Astronomy,2004,34(5):540-548.
[16] 陆晓东,李晓苇.硫增感AgBrI T颗粒乳剂光电子行为研究[J].感光科学与光化学,2004,22(3):202-210.Lu X D,Li X W.Application of microwave phase-sensitive technique in the study of photoelectron action in the sulfur-sensitized T-Grains AgBrI emulsion[J].Photographic Science and Photochemistry,2004,22(3):202-210.

纳米硫化铅增感的溴化银微晶中光电子衰减特性研究

The Study of Decay Characteristics of Photoelectrons in Cubic AgBr Sensitized by PbS Nanoparticales

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 9

编辑推荐

Metrics

本文评价

[1]	王英茹, 柳青. K₄[Ru(CN)₆]对T-颗粒溴碘化银乳剂感光性能及光电子寿命影响的研究[J]. 影像科学与光化学, 2008, 26(3): 244-253.
[2]	刘霁, 周涛, 岳军. 卤化银微晶体的光电子行为[J]. 影像科学与光化学, 2005, 23(3): 218-231.
[3]	傅广生, 刘荣鹃, 杨少鹏, 江晓利, 代秀红, 李晓苇. 曝光强度对卤化银微晶中载流子行为及其陷阱效应的影响[J]. 影像科学与光化学, 2005, 23(1): 21-28.
[4]	曹立志, 庄思永. 溴碘化银T-颗粒晶体中的电子和空穴行为研究[J]. 影像科学与光化学, 2004, 22(2): 114-119.
[5]	杨少鹏, 傅广生, 曹宁, 孟涛, 董国义, 李晓苇. 染料增感AgBr乳剂的光电子衰减动力学研究[J]. 影像科学与光化学, 2003, 21(5): 321-327.
[6]	杨少鹏, 董国义, 陆晓东, 李晓苇, 傅广生. 硫增感AgBr I T颗粒乳剂光电子行为研究[J]. 影像科学与光化学, 2003, 21(3): 176-183.
[7]	傅广生, 杨少鹏, 李晓苇, 韩理, 胡小勇, 孙宇臣, 马礼谦. 卤化银感光材料光作用动力学研究进展[J]. 影像科学与光化学, 2002, 20(1): 60-68.
[8]	戴晖, 梁冰, 庄思永, 孙健, 张大德. [Fe(CN)₆]^4-在溴碘化银T-颗粒乳剂中的掺杂[J]. 影像科学与光化学, 2001, 19(4): 262-267.
[9]	戴晖, 梁冰, 庄思永. 卤化银乳剂制备中的新型掺杂剂[J]. 影像科学与光化学, 2001, 19(1): 72-78.