TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The principal chain of high molecular compound has structural unit of formula: -(M1(-(Z)n-))a-(M2-)b (II), or formula (III), preferably of formula (IV). The high molecular compound contained in the intermediate layer has 3 or more amino groups per aromatic ring of principal chain. At least 1 of amino group is tertiary amino group. The intermediate layer is electron carrying layer (27). The electrode which contacts intermediate layer is indium-tin-oxide, molybdenum oxide, copper or silver, preferably silver. The anode is transparent electrode. The constituent material of cathode contains metal equivalent to aluminum or metal having high ionization potential than aluminum. The constituent material of cathode contains silver, gold or copper. The photoelectric conversion element has structure of formulae (V)-(VII). The intermediate layer is interposed between 2 layers of photoelectric converting layers having positive hole transport layer (26) and electron carrying layer. The positive hole transport layer contains p-type conductive polymer. The high molecular compound has 1.5 or more of primary and quaternary amino groups per aromatic ring as substituent in principal chain.M1,M2=aryl, or heteroaryl having monocyclic ring or condensed ring;Z=;a=more than 0;b=0 or more;a+b=1;n=1,2 or 3;X1,X2=nitrogen, carbon, silicon, or phosphorus, preferably carbon;Y'1,Y'2=group of formula: -C(R3)=C(R4)-, -C(R5)=N-, -O-, or -S-;R3-R12=H, or 1-20C alkyl, 3-20C cycloalkyl, 6-30C aryl, or 1-30C heteroaryl (all optionally substituted);L5-L7=1-20C alkylene, 3-20C cycloalkylene, 2-20C alkynylene, 6-30C arylene, 1-30C heteroarylene, or 1-20C alkyleneoxy (all optionally substituted), or bivalent coupling group of -(L'1)-(OR)p- (i);Y'3,Y'4=-C(R10)=C(R11)-, -C(R12)=N-, -O-, or -S-, preferably -CH=CH-, -CH=N-, or -S-;X3=carbon, silicon, or germanium;R13,R14=1-20C alkyl, 3-20C cycloalkyl, 6-30C aryl, or 1-30C heteroaryl (all optionally substituted);Y'5,Y'6=-C(R17)=, or -N=;andR15-R17=1-20C alkyl, 1-20C fluorinated alkyl, 3-20C cycloalkyl, 3-20C fluorinated cycloalkyl, 1-20C alkoxy, 1-20C fluorinated alkoxy, 1-20C fluorinated alkylthio, 6-30C aryl, 6-30C fluorinated aryl, 1-20C heteroaryl, halo, or 1-20C fluorinated heteroaryl (all optionally substituted).Preferred Property: The pH of positive hole transport layer is 4 or less.