| Автор | R N Marks |
| Автор | J J M Halls |
| Автор | D D C Bradley |
| Автор | R H Friend |
| Автор | A B Holmes |
| Дата выпуска | 1994-02-14 |
| dc.description | We report measurements of the photovoltaic effect in diode structures formed with thin films (100 nm) of the conjugated polymer poly(p-phenylene vinylene), PPV, sandwiched between electrodes of indium/tin oxide, ITO, and either aluminium, magnesium or calcium. Under illumination incident through the ITO contact, large open-circuit voltages were measured, which saturated at approximately 1.2 V for Al and Mg devices, and approximately 1.7 V for Ca devices. Quantum efficiencies (short-circuit current/incident photon flux) of order 1% were measured at low intensities (0.1 mW cm<sup>-2</sup>). The spectral response of the photocurrent demonstrates that photon absorption near the electron-collecting electrode optimizes the photocurrent, indicating that device performance is limited by low electron mobilities in the bulk PPV. The photocurrent exhibits a weak temperature dependence, with an activation energy that is a function of the electric field in the polymer. We have used these measurements to estimate an exciton binding energy in PPV of approximately 0.4 eV. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | The photovoltaic response in poly(p-phenylene vinylene) thin-film devices |
| Тип | paper |
| DOI | 10.1088/0953-8984/6/7/009 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 6 |
| Первая страница | 1379 |
| Последняя страница | 1394 |
| Аффилиация | R N Marks; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | J J M Halls; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | D D C Bradley; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | R H Friend; Cavendish Lab., Cambridge Univ., UK |
| Аффилиация | A B Holmes; Cavendish Lab., Cambridge Univ., UK |
| Выпуск | 7 |
