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Study of transportation of exctions on poly 3-hexylthiophene

YING GUO1,* , GUILIN LIU2, HUIMIN YAN2, HUAXIN ZHU2, XI XI3, YIXIN ZHANG1, GUOHUA LI1,3

Affiliation

  1. School of Science, Jiangnan University, Wuxi 214122, China
  2. School of Internet of Things, Jiangnan University, Wuxi 214122, China
  3. Jiangsu (Suntech) Institute for Photovoltaic Technology, Wuxi 214028, China

Abstract

In order to explain the transport and mobility of excitons, based on quantum theory, the hydrogen-like atom wave function and modification of effective charges were used to find out energy levels of poly 3-hexylthiophene (P3HT). As a result, the performance of organic solar cells can be inferred from the derived absorption character of organic material. The results are perfectly coincided with experimental data. The main absorption peak of P3HT is around 550nm, but excitons simulated by photons around 550nm can not hop to donor/acceptor (D/A) interface, which have no contribution to the Power Conversion Efficiency (PCE). Meanwhile, effective mass was used to explain the mobilities of holes. It indicates that a new structure of material which can improve the mobility of holes by enhancing the molecular conjugation and decreasing the branches..

Keywords

Orgainc solar cells, Excitons, Hopping conduction, Effective mass, Effective charges.

Citation

YING GUO, GUILIN LIU, HUIMIN YAN, HUAXIN ZHU, XI XI, YIXIN ZHANG, GUOHUA LI, Study of transportation of exctions on poly 3-hexylthiophene, Optoelectronics and Advanced Materials - Rapid Communications, 8, 5-6, May-June 2014, pp.511-514 (2014).

Submitted at: March 9, 2013

Accepted at: May 15, 2014