Method for detecting photoelectric current signal of photoelectric conversion material via conductive atomic force microscope

An atomic force microscope and photoelectric conversion material technology, which is applied in the field of signal detection, can solve the problems of difficulty in distinguishing current amplifiers, material temperature rise, photoelectric conversion material damage, etc., and achieves the effect of suppressing useless noise and improving detection signal-to-noise ratio.
CN106546771AActive Publication Date: 2017-03-29宁波新材料测试评价中心有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
宁波新材料测试评价中心有限公司
Publication Date
2017-03-29

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Abstract

The invention provides a method for detecting a photoelectric current signal of a photoelectric conversion material via a conductive atomic force microscope. A lock-in amplifier is used, the lock-in amplifier provides an alternating driving voltage so that a light source is driven to emit light to irradiate a material sample, the sample generates an optical current due to a photoelectric conversion effect, a conductive probe makes contact with the sample to detect the photoelectric current signal and transmits the photoelectric current signal to a current amplifier to obtain a current amplification signal, and the current amplification signal is then input to the lock-in amplifier. Thus, the frequency of a reference signal of lock-in amplification is the same with that of the driving voltage, lock-in amplification of the photoelectric current signal is realized, and the sensitivity and signal to noise ratio of photoelectric current detection are improved.
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Description

technical field

[0001] The invention belongs to the technical field of signal detection, and in particular relates to a method for detecting photocurrent signals of photoelectric conversion materials by using a conductive atomic force microscope. Background technique

[0002] The research on organic solar cells began in the 1970s. Compared with traditional solar cells, organic solar cells have the advantages of designable molecular structure, light material weight, simple production process, low manufacturing cost, good processing performance, and rollability. Therefore, it has received extensive attention in the field of solar cells with the development direction of improving battery performance, reducing production costs, and reducing environmental pollution.

[0003] Theoretical studies have shown that the nanostructure of the active layer with photoelectric conversion effect in organic solar cells (that is, the material of the active layer is a photoelectric conversion m...

Claims

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