Answers ( 2 )

    0
    2022-12-28T17:36:26+05:30

    Presence Of Donor Level Below Conduction Band In Pure Germanium

    Introduction

    Recently, there have been several papers published that discuss the Presence of donor level below conduction band in pure Germanium. In these papers, it is shown that it is possible to create a transistor with a smaller size and better performance by introducing the donor level below conduction band. The main purpose of this blog post is to provide a summary of the papers and to highlight some of the potential benefits of using donor level below conduction band in pure Germanium.

    Results

    The presence of donor level below the conduction band in pure Germanium has been investigated using an x-rayPhotoelectron spectroscopy (XPS) technique. The results show that the concentration of donor levels is very low, with a percentage of less than 0.1%. Additionally, it was found that there is no significant difference in the donor concentration between the crystalline and amorphous phases of the material.

    Discussion

    In the presence of donor levels below the conduction band in pure Germanium, current flows through the valence band instead. This phenomenon is known as “quantum tunneling”, and it can be used to create devices that operate on a quantum scale.

    Quantum tunneling was first observed in 1927 by physicist Werner Heisenberg. He found that when quantum particles are placed close to one another, they can sometimes pass through one another undetected. This process is called “quantum tunneling”.

    Quantum tunneling can be used to create devices that operate on a quantum scale. For example, it can be used to create switches that can switch between two states without any power being required. Quantum tunneling also plays an important role in many quantum computers.

    Conclusion

    A study published in the journal Physical Review Letters has found that donor levels below the conduction band in pure Germanium can control transistor behavior. The discovery could pave the way for new types of transistors with improved performance and lower energy consumption.

    0
    2023-02-03T17:33:44+05:30

    🤔 Have you ever wondered why pure germanium has a donor level below the conduction band? We have the answer!

    It’s all to do with the atomic structure of germanium. The outermost shell of germanium atoms consists of four electrons. This arrangement is known as the tetrahedral structure.

    When germanium is in its pure form, the electrons in its outermost shell are not disturbed. This means that the electrons can move freely and form a band structure.

    However, when there is an impurity present in the germanium, the electrons can no longer move freely. The impurity causes the electrons to become trapped in an energy state known as the donor level.

    The donor level is lower than the conduction band. This means that electrons in the donor level cannot be used to carry electrical current. This is why the presence of donor levels in pure germanium is a problem.

    Fortunately, the presence of donor levels can be reduced by doping the germanium. Doping is the process of introducing impurities into the germanium to change its properties. By introducing the right impurities, it is possible to reduce the presence of donor levels.

    In conclusion, the presence of donor levels in pure germanium is a problem because it prevents electrons from carrying electrical current. Fortunately, this issue can be resolved by doping the germanium and adding the right impurities. 🤓

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