Photoenhanced injection currents in organic solar cells

Frohne, Holger; McNeill, Christopher R.; Dastoor, Paul C.
August 2004
Applied Physics Letters;8/9/2004, Vol. 85 Issue 6, p1042
Academic Journal
Bulk heterojunction organic solar cells with the general structure: indium tin oxide/polyethylenethioxythiophene (PEDOT)/bulk-heterojunction layer/Al with built-in fields between -0.1 and 1 V have been fabricated by electrochemically doping the PEDOT electrode. The active bulk-heterojunction layer consisted of a blend of MDMO-PPV (poly(2-methoxy-5-(3′,7′-dimethyl)octyloxy-1,4-phenylenevinylene)) and PCBM ((6,6)-phenyl-C61-butyric-acid methyl ester)). Measurements of the current–voltage curves with varying light intensities for these devices reveal the presence of light-dependent currents in addition to those from the photogenerated charge carriers. Equivalent circuit modeling indicates that these light-dependent currents most likely originate from photoenhanced injection at the electrodes.


Related Articles

  • Drift-diffusion modeling of photocurrent transients in bulk heterojunction solar cells. Hwang, Inchan; McNeill, Christopher R.; Greenham, Neil C. // Journal of Applied Physics;Nov2009, Vol. 106 Issue 9, p094506 

    We utilize a time-dependent drift-diffusion model incorporating electron trapping and field-dependent charge separation to explore the device physics of organic bulk-heterojunction solar cells based on blends of poly(3-hexylthiophene) (P3HT) with a red polyfluorene copolymer. The model is used...

  • Field-enhanced charge flow in nanorod heterostructure solar cells. Kwok, H. // Applied Physics B: Lasers & Optics;May2011, Vol. 103 Issue 2, p377 

    Recent studies on organic heterostructure solar cells have indicated that interface morphology plays an important role in determining the quantum efficiency. Hybrid heterostructure mixing donor and acceptor semiconductors appear to offer the best opportunity in achieving superior performance and...

  • Electrical transport mechanisms in a-Si:H/c-Si heterojunction solar cells. Schulze, T. F.; Korte, L.; Conrad, E.; Schmidt, M.; Rech, B. // Journal of Applied Physics;Jan2010, Vol. 107 Issue 2, p023711 

    We present temperature-dependent measurements of I-V curves in the dark and under illumination in order to elucidate the dominant transport mechanisms in amorphous silicon-crystalline silicon (a-Si:H/c-Si) heterojunction solar cells. ZnO:Al/(p)a-Si:H/(n)c-Si/(n+)a-Si:H cells are compared with...

  • Carrier mobility, structural order, and solar cell efficiency of organic heterojunction devices. Street, R. A. // Applied Physics Letters;9/29/2008, Vol. 93 Issue 13, p133308 

    The loss mechanisms limiting solar cell efficiency in organic heterojunction photodiodes are discussed. We show that the energy loss when the exciton is split, and absence of Langevin recombination at the interface, are related to the magnitude of the electron-phonon interaction and the...

  • Correlation of hole mobility, exciton diffusion length, and solar cell characteristics in phthalocyanine/fullerene organic solar cells. Terao, Yuhki; Sasabe, Hiroyuki; Adachi, Chihaya // Applied Physics Letters;3/5/2007, Vol. 90 Issue 10, p103515 

    The authors investigated heterojunction organic solar cells composed of different metal phthalocyanines (MPcs, M=Fe, Co, Ni, Cu, and H2)/fullerene (C60) and compared the solar cell characteristics with the field-effect hole mobilities (μh) and exciton diffusion length (Lex) of the different...

  • Performance of annealed hybrid silicon heterojunctions: A numerical computer study. Rubinelli, F. A.; Marsal, L. F.; Pallarès, J. // Journal of Applied Physics;2/1/2005, Vol. 97 Issue 3, p034904 

    The performance of the standard hydrogenated amorphous silicon carbon–crystalline silicon solar cell is extensively compared with the performance of a hybrid structure subjected to a high-temperature annealing processing. Our analysis indicates that high-temperature-annealed...

  • Mixed donor-acceptor molecular heterojunctions for photovoltaic applications. II. Device performance. Jiangeng Xue; Rand, Barry P.; Uchida, Soichi; Forrest, Stephen R. // Journal of Applied Physics;12/15/2005, Vol. 98 Issue 12, p124903 

    We demonstrate efficient organic photovoltaic cells employing a photoactive region composed of a mixed donor-acceptor molecular layer, the properties of which were introduced in the preceding paper (Part I) [Rand et al., J. Appl. Phys. 98, 124902 (2005)]. The hybrid planar-mixed heterojunction...

  • First solar cells based on CdTe nanoparticle/MEH-PPV composites. Kumar, Sandeep; Nann, Thomas // Journal of Materials Research;Jul2004, Vol. 19 Issue 7, p1990 

    Hybrid bulk heterojunction composites are promising material for low-cost organic solar cells. Fundamental measurements with CdTe nanocrystal/MEH-PPV poly [2-methoxy-5-(2'-ethyl-hexyloxy)-1,4-phenylene vinylene] composites and the first realization of a solar cell based on this material are...

  • Characterization of Transition Metal Oxide/Silicon Heterojunctions for Solar Cell Applications. Gerling, Luis G.; Mahato, Somnath; Voz, Cristobal; Alcubilla, Ramon; Puigdollers, Joaquim // Applied Sciences (2076-3417);2015, Vol. 5 Issue 4, p695 

    During the last decade, transition metal oxides have been actively investigated as hole- and electron-selective materials in organic electronics due to their low-cost processing. In this study, four transition metal oxides (V2O5, MoO3, WO3, and ReO3) with high work functions (>5 eV) were...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics