What is OghmaNano?

OghmaNano was originally created as a simulator for photovoltaic devices, but has since evolved into a comprehensive multi-physics platform for optoelectronics. It is uniquely suited to emerging and disordered materials, combining electrical drift–diffusion, optical wave propagation, exciton dynamics, and ionic transport within a single framework. Today OghmaNano is used at leading universities and companies worldwide, with thousands of downloads (see ??). The examples in ?? illustrate the range of devices that can be modelled — from solar cells and OLEDs to waveguides, filters, and large-area printed electronics.

Global OghmaNano usage map — Worldwide distribution of OghmaNano users

Electrical models:
- 1D, 2D, and 3D electrical drift–diffusion solvers
- Dynamic Shockley–Read–Hall (SRH) traps for disordered materials
- Simple equivalent circuit model
- Full 3D circuit solver for complex, large-area devices
- Arbitrary, user-defined trap state distributions
- Thermal–electrical coupling for temperature-dependent simulations
- Time-domain, frequency-domain, and steady-state solvers
- Support for tunnelling, field emission, and interface recombination

a) Organic/Perovskite solar cell simulation; b) OFET transistor simulation; c) Microlens simulation; d) Photonic waveguide simulation; e) Light escaping structured films; f) OLED simulation; g) Optical filter simulation; h) Large area device modelling (hexagonal contacts); i) Mapping carrier density in position/energy space; j) Building complex 3D meshes; k) Resistance maps of large area devices.

Optical models:
- Transfer-matrix method (TMM) for thin-film interference and absorption
- Full-wave finite-difference time-domain (FDTD) solver
- Ray-tracing engine for scattering and textured interfaces
- 1D/2D optical mode solvers for waveguides and resonators
- Arbitrary light source spectra and optical filter definitions
- Coupled optical–electrical simulations with position-dependent generation

Excited states and mobile ions:
- 1D/2D/3D exciton transport solver
- Excited singlet/triplet state modelling for OLEDs and photophysics
- Mobile ion migration in perovskites and other ionic materials
- Doping profiles, interface charges, and ion–electron interactions

Other features and databases:
- Comprehensive materials database with optical, electrical, and thermal properties
- 3D geometry engine for importing or generating complex structures
- Shape conversion tools for CAD and simulation formats
- Scriptable interface for automation and parameter sweeps
- Integration with experimental data for fitting and optimisation
- Cross-platform support (Windows and Linux)
- Accurate coupled modelling of electrical, optical, and thermal effects
- Support for disordered and emerging materials
- Integration with experimental data for fitting and validation