NOVELTY - Metal complexes comprising condensed heteroaryl rings are new.    USE - For preparing composition comprising organic functional material, which is useful for forming electronic device such as organic electroluminescent devices (organic light emitting diodes (OLEDs), polymer light emitting diodes (PLEDs)), organic integrated circuits (O-ICs), organic field effect transistors (O-FETs), organic thin film transistors (O-TFTs), organic light emitting transistors (O-LETs), organic solar cells (O-SCs), organic optical detectors, organic photoreceptors, organic field quenching devices (O-FQDs), light emitting electrochemical cells or organic light emitting cells (LECs, OLECs, LEECs) and organic laser diodes (O-Laser), where electroluminescent device that is OLED or OLEC is useful for phototherapy in medicine or for cosmetic use (all claimed), such as for irradiating skin, wounds, mucous membranes, eye, hair, nails, nail bed, gums and tongue; treating internal organs (e.g. heart, lung), blood vessels or breast; treating psoriasis, skin aging, skin wrinkling, actinic keratosis, skin ulcers, acne, acne bacteria, jaundice, skin cancer, skin tumors, Crigler-Najjar syndrome, diabetic skin ulcers; inflammatory diseases, rheumatoid arthritis, pain, neurological diseases, Paget's disease, primary and metastasizing tumors, irradiation of retina, neovascular and hypertrophic diseases, allergic reactions, irradiation of respiratory tract, sweating, ocular neovascular diseases, viral infections such as infections caused by herpes simplex or human papillomaviruses for treatment of warts and genital warts; winter depression, sleeping sickness, irradiation for improving mood, muscular pain, stiffness of joints and whitening of teeth (bleaching); for disinfection treatment of objects (non-living materials) or subjects (living materials such as humans and animals) for disinfection such as for disinfection of wounds, reduction in bacteria, disinfection of surgical instruments or other articles, disinfection of foods and liquids such as water, drinking water and other drinks, and disinfection of mucous membranes, gums and teeth.    ADVANTAGE - The metal chelate complexes and devices comprising metal chelate complexes show excellent efficiencies, preferential color, good stabilities, long shelf-life, improved solubility, good processability, and can be manufactured easily. Thus solve problems of prior art. The devices comprising metal chelate complexes can be made in simple device setup and still lead to high electroluminescent (EL) efficiencies and good lifetimes. The compounds can be synthesized in high yield and purification of compounds is easy, even on large scale. This makes up-scaling straightforward and materials suited for mass production of devices. The compounds have very good solubility in high number of common organic solvents and are therefore highly suitable for processing from solution. This makes them ideally suited for applications that require low production costs, such as illumination and signage devices, and for roll-to-roll-processed devices on flexible substrates. The compounds and electronic devices comprising them show improved stability and improved shelf life compared to similar compounds of prior art. Organic electroluminescent devices comprising compounds as emitting materials show excellent efficiencies and lifetimes. Even very simple devices have efficiencies and lifetimes sufficient for monochrome illumination and signage applications. The emission color of compounds is beneficial for number of different applications e.g. for treatment or prevention of skin issues in phototherapeutic devices or for low cost two-color white devices for lighting applications.    DETAILED DESCRIPTION - Metal complexes comprising condensed heteroaryl rings of formula (I) are new.    ring A+ring B=condensed heteroaryl ring system where both rings A and B are optionally substituted with greater than or equal to 1 R 1;    ring A=(hetero)aryl ring or (hetero)aryl polycyclic ring system (preferably ring or ring system of formula (ii));    X'=CR 1 or N;    ring B=monocyclic heteroaryl ring;    ring C=structure of formula (i) which is condensed to ring D at any positions;    a and b=0-2;    c=0-4;    M'=iridium, rhodium, platinum or palladium;    R 1=e.g. N(R 2) 2, Si(R 2) 3, straight-chain 1-40C alkyl;or    R 1+R 1=mono- or polycyclic, aliphatic, aryl and/or benzo-fused ring system;    R 2=e.g. N(R 3) 2, P(=O)(R 3) 2, straight-chain 2-40C alkenyl;or    R 2+R 2=mono- or polycyclic, aliphatic, aryl and/or benzo-fused ring system;    R 3=e.g. aliphatic, and/or (hetero)aryl 1-20C hydrocarbyl (having greater than or equal to 1 H atom optionally replaced by F), H, D;or    R 3+R 3=mono- or polycyclic, aliphatic or aryl ring system;    Q'=e.g. R 1C=CR 1, R 1C=N, O;    X 1 and X 2=CR 1 or N;    V'=e.g. NR 1, O, S.    Provided that:    (1) when M' is iridium or rhodium, then n is 2;    (2) when M' is platinum or palladium, then n is 1; and    (3) greater than or equal to 1 of X 1 and X 2 is N.    Full Definitions are given in the DEFINITIONS (Full Definitions) section. INDEPENDENT CLAIMS are included for the following:    (1) composition (C1) comprising: greater than or equal to 1 compound (I) and greater than or equal to 1 further organic functional material selected from hole transport materials (HTM), hole injection materials (HIM), electron transport materials (ETM), electron injection materials (EIM), hole blocking materials (HBM), exciton blocking materials (ExBM), host or matrix materials, fluorescent emitter, and phosphorescent emitter (preferably host or matrix materials, fluorescent emitter, or phosphorescent emitter; especially host or matrix materials);    (2) formulation (F1) comprising greater than or equal to 1 compound (I) or greater than or equal to 1 composition (C1), and greater than or equal to 1 solvent; and    (3) electronic device comprising greater than or equal to 1 compound (I) or the composition (C1), where the device is selected from organic electroluminescent devices (organic light emitting diodes (OLEDs), polymer light emitting diodes (PLEDs)), organic integrated circuits (O-ICs), organic field effect transistors (O-FETs), organic thin film transistors (O-TFTs), organic light emitting transistors (O-LETs), organic solar cells (O-SCs), organic optical detectors, organic photoreceptors, organic field quenching devices (O-FQDs), light emitting electrochemical cells or organic light emitting cells (LECs, OLECs, LEECs) and organic laser diodes (O-Laser) (preferably OLED or OLEC).