NOVELTY - A hexacyclic compound (I), is new.    USE - New hexacyclic compound is used as hole transporting and light absorbing material in photovoltaic solid state devices e.g. solid state solar cell, heterojunction, optoelectronic device and light-emitting device (all claimed). Can also be used as light harvester and light absorbing material.    ADVANTAGE - The hexacyclic compound improves photo-to-current conversion efficiency of solid photovoltaic devices, and an absorb light to the near infrared regions of the light spectrum of 400-920 nm. In solid state photovoltaic device, the hexacyclic compound absorbs remanent light passing through a sensitizer layer.    DETAILED DESCRIPTION - A hexacyclic compound of formula (I), is new.    W'=N or P;    V'=C(R1)2, C=O or O;    R1=1-12C alkyl or 1C alkyl;    L=group of formula: (Z)n-(Ac)m-Ar' or group of formula (i);    p=0-2;    Z=heteroaryl chosen from 4-20C heteroaryl, 4-20C aryloxy, 4-20C heteroaryloxy (all substituted by linear, branched or cyclic 1-20C alkyl, 1-20C heteroalkyl, 2-20C alkenyl or 2-20C alkynyl (all comprising 3 or more carbon)), in which heteroatom is chosen from O, S, Se and Si;    n=0-3;    Ac=acceptor group chosen from groups of formulae (ii)-(xix);    R2-R37=H, ether, 1-16C alkyl, 1-16C alkoxy, 1-16C thioalkyl, 1-16C alkoxyalkyl, 4-16C aryl, 1-16C arylalkyl, 4-16C heteroaryl, or 4-16C heteroarylalkyl, in which heteroatom is chosen from O, S and N;    Q=S, O, Se, Si or N;    Y'=N or C (both optionally substituted by halo chosen from F, Cl, I, and Br);    m=0 or 1;and    Ar'=aryl or heteroaryl chosen from 4-20C aryl, 4-20C heteroaryl, 4-20C aryloxy, 4-20C heteroaryloxy (all substituted by linear, branched or cyclic 1-20C alkyl, 1-20C heteroalkyl, 2-20C alkenyl or 2-20C alkynyl (all comprising 3 or more carbon)), -COOH, =O, or 4-16C cyanoalkenyl carboxylic acid, in which heteroatom is chosen from O, S, Se and Si.    When Q is N, nitrogen atom is substituted by substituent R2-R37. An INDEPENDENT CLAIM is included for photovoltaic solid state device comprising the hexacyclic compound (I).