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Effect of traps on the charge transport in semiconducting polymer PCDTBT

IR@NPL: CSIR-National Physical Laboratory, New Delhi


Field	Value

Title	Effect of traps on the charge transport in semiconducting polymer PCDTBT

Creator	Khan, Mohd Taukeer Agrawal, Vikash Almohammedi, Abdullah Gupta, Vinay

Subject	Electronics and Electrical Engineering Applied Physics/Condensed Matter

Description	Organic semiconductors (OSCs) are nowadays called upon as promising candidates for next generation electronics devices. Due to disorder structure of these materials, a high density of traps are present in their energy band gap which affect the performance of these devices. In the present manuscript, we have investigated the role of traps on charge transport in PCDTBT thin film by measuring the temperature dependent J(V) characteristics in hole only device configuration. The obtained results were analyzed by space charge limited (SCL) conduction model. It has been found that the room temperature J(V) characteristics follow Mott-Gurney square law for trap-free SCL conduction. But below 278 K, the current increases according to trap-filling SCL law with traps distributed exponentially in the band gap of semiconductor. Furthermore, after reaching a crossover voltage of V-c similar to 12 V, all the traps filled by injected carriers and the trap-filling SCL current switch to trap-free SCL current. The hole mobility of trap-free SCL current is about one order higher as compared trap-filling SCL current and remains constant with temperature.

Publisher	Elsevier

Date	2018-07

Type	Article PeerReviewed

Format	application/pdf

Identifier	http://npl.csircentral.net/3857/1/Effect%20of%20traps%20on%20the%20charge%20transport.pdf Khan, Mohd Taukeer and Agrawal, Vikash and Almohammedi, Abdullah and Gupta, Vinay (2018) Effect of traps on the charge transport in semiconducting polymer PCDTBT. Solid-State Electronics, 145. pp. 49-53. ISSN 0038-1101

Relation	http://npl.csircentral.net/3857/