ﺳﺎﺧﺖ و ﻣﺸﺨﺼﻪ ﯾﺎﺑﯽ اﭘﺘﯿﮑﯽ و اﻟﮑﺘﺮﯾﮑﯽ ﻗﻄﻌﺎت ﺳﺎﻧﺪوﯾﭽﯽ ﻧﺎﻧﻮﺳﺎﺧﺘﺎر ﺑﺮوﻣﻮاﯾﻨﺪﯾﻮم ﻓﺘﺎﻟﻮﺳﯿﺎﻧﯿﻦ

Fabrication and Characterization of Optical and Electri- cal properties of BrInPcs Sandwich Nanostructures

در اﯾﻦ ﭘﮋوﻫﺶ، ﺳﺎﺧﺖ، ﺑﺮرﺳﯽ ﻣﻮﻓﻮﻟﻮژي و ﻣﺸﺨﺼﻪ ﯾﺎﺑﯽ اﻟﮑﺘﺮﯾﮑﯽ و اﭘﺘﯿﮑﯽ ﻗﻄﻌﺎت ﻧﯿﻤﻪ ﻫﺎدي ﮐﻪ داراي ﺳﺎﺧﺘﺎر ﺳﺎﻧﺪوﯾﭽﯽ ﻣﺘﺸﮑﻞ از ﯾﮏ ﻻﯾﻪ ﻧﺎزك ﻧﺎﻧﻮﺳﺎﺧﺘﺎرﻫﺎي ﺑﺮوﻣﻮاﯾﻨﺪﯾﻮم ﻓﺘﺎﻟﻮﺳﯿﺎﻧﯿﻦ و اﻟﮑﺘﺮودﻫﺎي آﻟﻮﻣﯿﻨﯿﻮﻣﯽ ﻫﺴﺘﻨﺪ ﮔﺰارش ﻣﯽ ﺷﻮد. ﺑﺮاي اﯾﺠﺎد اﯾﻦ ﻗﻄﻌﺎت از روش ﻻﯾﻪ ﻧﺸﺎﻧﯽ ﺗﺒﺨﯿﺮ ﺑﺎرﯾﮑﻪ اﻟﮑﺘﺮوﻧﯽ در ﺧﻼء 10-5ﻣﯿﻠﯽ ﺑﺎر، ﭘﺮداﺧﺘﻪ ﺷﺪه اﺳﺖ. ﺑﺮاي ﻣﺸﺨﺼﻪ ﯾﺎﺑﯽ اﻟﮑﺘﺮﯾﮑﯽ ﺗﺎﺛﯿﺮ دﻣﺎ و ﻓﺮﮐﺎﻧﺲ روي ﻣﮑﺎﻧﯿﺰم رﺳﺎﻧﺶ ﺟﻬﺖ ﺗﻌﯿﯿﻦ ﻓﺮاﯾﻨﺪ اﻧﺘﻘﺎل ﺣﺎﻣﻞ ﻫﺎ ﻣﻮرد آزﻣﺎﯾﺶ ﻗﺮار ﮔﺮﻓﺖ. ﻧﺘﺎﯾﺞ ﻧﺸﺎن ﻣﯽ دﻫﻨﺪ ﮐﻪ ﻇﺮﻓﯿﺖ و ﻋﺎﻣﻞ اﺗﻼف ﺑﺎ اﻓﺰاﯾﺶ ﻓﺮﮐﺎﻧﺲ و دﻣﺎ اﻓﺰاﯾﺶ ﻣﯽ ﯾﺎﺑﻨﺪ. رﻓﺘﺎر ﻇﺮﻓﯿﺖ و ﻋﺎﻣﻞ اﺗﻼف ﺗﻄﺒﯿﻖ ﺧﻮﺑﯽ ﺑﺎ ﻣﺪل ﮔﺎﺳﻮاﻣﯽ-ﮔﺎﺳﻮاﻣﯽ دارد و در اﯾﻦ ﻣﻮرد ﺗﺌﻮري ﻫﻮﭘﯿﻨﮓ ﻏﺎﻟﺐ اﺳﺖ. ﻋﻼوه ﺑﺮاﯾﻦ، آﻧﺎﻟﯿﺰ ﻃﯿﻒ ﺟﺬﺑﯽ ﻧﺸﺎن ﻣﯽ دﻫﺪ ﮐﻪ ﮔﺎف اﻧﺮژي اﭘﺘﯿﮑﯽ 3 اﻟﮑﺘﺮون وﻟﺖ اﺳﺖ. ﺑﻨﺎﺑﺮاﯾﻦ واﺑﺴﺘﮕﯽ دﻣﺎﯾﯽ و ﻓﺮﮐﺎﻧﺴﯽ وﯾﮋﮔﯽ ﻫﺎي اﻟﮑﺘﺮﯾﮑﯽ ﻧﺎﻧﻮﺳﺎﺧﺘﺎرﻫﺎي ﺑﺮوﻣﻮاﯾﻨﺪﯾﻮم ﻓﺘﺎﻟﻮﺳﯿﺎﻧﯿﻦ ﻧﺸﺎن ﻣﯽ دﻫﺪ ﮐﻪ اﯾﻦ ﻧﺎﻧﻮﺳﺎﺧﺘﺎرﻫﺎ ﭘﺘﺎﻧﺴﯿﻞ ﺧﻮﺑﯽ ﺑﺮاي ﮐﺎرﺑﺮد ﺣﺴﮕﺮي دارﻧﺪ.

In this work, we report on the fabrication, morphology, and electrical and optical characterization of sandwich devices of bromo indium phthalocyanine thin film nanostructures in aluminum electrodes using electron beam evaporation in a high vacuum which are promising for sensing applications. We investigate the influence of both parameters of temperature and frequency on the conduction mechanism to determine the transport process of the charge carriers. Result demonstrates that the capacitance and the loss factor decrease with increasing the frequency and increase for high temperatures. The behavior of the capacitance and loss factor fits well with the model of Goswami and Goswami and the results imply the domination of the hopping theory. In addition, analysis of absorption spectrum indicates that the optical band gap energy is 3eV. Furthermore, morphological analysis demonstrates that all films have a smooth surface with homogeneous small crystal grains with a nanoscale size order of 40 ±10nm. Thus, temperature and frequency dependent experiments of optical and electrical parameters of the bromo indium phthalocyanine thin film nanostructures show their potential to be employed for developing a multifunction sensor.